TY - THES A1 - Höhne, Janet T1 - Aktivitäts- und Herzfrequenz-Monitoring zur Erfassung der Bewegungszeit und der Bewegungsintensität im schulischen und außerschulischen Kontext von Grundschülern im Land Brandenburg T1 - Activity and heart rate monitoring to detect the movement of time and intensity of movement in and outside the school context of elementary school students in the state of Brandenburg N2 - "Kinderwelt ist Bewegungswelt" (Schmidt, 1997, S. 156, zitiert nach Schmidt, Hartmann-Tews & Brettschneider, 2003, S. 31). Das kindliche Bewegungsverhalten hat sich bereits im Grundschulalter verändert, so dass sich Bewegungsaktivitäten von Kindern erheblich unterscheiden und keineswegs mehr verallgemeinert werden können. Richtet man den Fokus auf die Frage „Wie bewegt sind unsere Kinder?“ so scheint diese von den Medien bereits beantwortet zu sein, da dort von ansteigendem Bewegungsmangel der heutigen Kinder gegenüber früheren Generationen berichtet wird. Wenn es in den Diskussionen um den Gesundheitszustand unserer Kinder geht, nimmt die körperlich-sportliche Aktivität eine entscheidende Rolle ein. Bewegungsmangel ist hierbei ein zentraler Begriff der in der Öffentlichkeit diskutiert wird. Bei der Betrachtung der einzelnen Studien fällt auf, dass deutliche Defizite in der Messung der körperlich-sportlichen Aktivität bestehen. Zentraler Kritikpunkt in den meisten Studien ist die subjektive Erfassung der körperlich-sportlichen Aktivität. Ein Großteil bisheriger Untersuchungen zum Bewegungsverhalten basiert auf Beobachtungen, Befragungen oder Bewegungstagebüchern. Diese liefern ausschließlich zum Teil subjektive Einschätzungen der Kinder oder Eltern über die tatsächliche Bewegungszeit und -intensität. Das objektive Erfassen der Aktivität bzw. Inaktivität ist zwar seit einigen Jahren zentraler Gegenstand vieler Studien, dennoch gilt es, dieses noch sachkundiger zu lösen, um subjektive und objektive Daten zu vergleichen. Um dem Bewegungsmangel der heutigen Kinder entgegenzuwirken, sind empirisch abgesicherte Erkenntnisse über die Bedingungsfaktoren und die Folgen des veränderten Bewegungsverhaltens dringend nötig. Die Quer- und Längsschnittuntersuchung umfasst die Bereiche Anthropometrie, die Erfassung der körperlich-sportlichen Aktivität und die Herzfrequenzmessung über 24h. Für die Studie konnten 106 Jungen und Mädchen im Zeitraum von Januar 2007 bis April 2009 rekrutiert und überprüft werden. Die physiologischen Parameter wurden mit Hilfe des ACTIHEART-Messsytems aufgezeichnet und berechnet. Die Ergebnisse zur körperlich-sportlichen Aktivität wurden in die Untersuchungsabschnitte Schulzeit gesamt, Pause, Sportunterricht, Nachmittag und 24h unterteilt. Durch das Messsystem werden die Bewegungsaktivität und die Herzfrequenz synchron aufgezeichnet. Das System nimmt die Beschleunigungswerte des Körpers auf und speichert sie im frei wählbaren Zeitintervall, Short oder Long Term, in Form von „activity counts“ ab. Das Messsytem berechnet weiterhin die Intensität körperlicher Aktivität. N2 - "Children's World is the world movement" (Schmidt, 1997, p. 156, quoted by Schmidt, Hartmann-Tews & Brettschneider, 2003, p. 31). The child's physical activity has changed already in elementary school, so that physical activity of children vary considerably and can not be more generalized. If we turn our focus to the question "What moves are our children?" So this seems to have been answered by the media, because there is increasing lack of physical activity reported by today's children from previous generations. When it comes to discussions about the health of our children, taking the physical and sporting activity plays a decisive role. Lack of exercise is a key term here is in the public's debate. When examining the individual studies is striking that significant deficiencies exist in the measurement of physical and sporting activity. The central point of criticism in most studies is the subjective detection of physical and sporting activity. A majority of previous studies on physical activity based on observations, interviews, or movement diaries. These provide only partly subjective assessments of the children or parents about the actual movement of time and intensity. The objective recording of activity or inactivity, although in recent years, the central subject of many studies, yet it is true, this knowledgeable yet to be resolved in order to compare subjective and objective data. To counteract the lack of movement of today's children, empirically based insights into the determinants and consequences of changes in physical activity are urgently needed. The cross-sectional and longitudinal study covers the areas of anthropometry, the collection of physical and sporting activity and heart rate measured over 24 hours. For the study, 106 boys and girls in the period January 2007 to April 2009 are being recruited and examined. The physiological parameters were recorded using the ACTIHEART-measuring systems and calculated. The results for physical and sporting activity were divided into the total school study sections, breaks, physical education, and 24 afternoon. By the measurement system's physical activity and heart rate recorded synchronously. The system records the acceleration of the body and stores it in the selected time interval, from Short or Long Term, in the form of "activity counts". The measurement system calculates the intensity of physical activity continue. KW - körperliche Aktivität KW - körperlich-sportliche Aktivität KW - Grundschulkinder KW - Actiheart KW - physical activity KW - heart rate KW - movement of time Y1 - 2011 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-57937 ER - TY - JOUR A1 - Hortobagyi, Tibor A1 - Deak, Dorina A1 - Farkas, Dora A1 - Blenyesi, Eszter A1 - Torok, Katalin A1 - Granacher, Urs A1 - Tollar, Jozsef T1 - Effects of exercise dose and detraining duration on mobility at late midlife BT - a randomized clinical trial JF - Gerontology N2 - Background: Office workers near retirement tend to be sedentary and can be prone to mobility limitations and diseases. We examined the dose effects of exergaming volume and duration of detraining on motor and cognitive function in office workers at late midlife to reduce sedentariness and mobility limitations. Methods: In an assessor-blinded randomized trial, 160 workers aged 55-65 years performed physically active video games in a nonimmersive form of virtual reality (exergaming) in small, supervised groups for 1 h, 1x, 2x, or 3x/week for 8 weeks followed by detraining for 8 and 16 weeks. Exergaming comprises high-intensity, full-body sensorimotor coordination, balance, endurance, and strengthening exercises. The primary outcome was the 6-minute walk test (6MWT), and secondary outcomes were body mass, self-reported physical activity, sleep quality, Berg Balance Scale, Short Physical Performance Battery, fast gait speed, dynamic balance, heart rate recovery after step test, and 6 cognitive tests. Results: The 3 groups were not different in any of the outcomes at baseline (all p > 0.05). The outcomes were stable and had acceptable reliability (intraclass correlation coefficients >= 0.334) over an 8-week control period. Training produced an inverted U-shaped dose response of no (1x), most (2x), and medium (3x/week) effects of exergaming volume in most motor and selected cognitive outcomes. The distance walked in the 6MWT (primary outcome) increased most (94 m, 19%, p < 0.05), medium (57 m, 12%, p < 0.05), and least (4 m, 1%) after exergaming 2x, 3x, or 0x (control) (all different p < 0.05). The highest responders tended to retain the exercise effects over 8 weeks of detraining, independent of training volume. This maintenance effect was less consistent after 16 weeks of detraining. Conclusion: Less was more during training and lasted longer after detraining. A medium dose volume of exergaming produced the largest clinically meaningful improvements in mobility and selected cognitive tests in 60-year-old office workers with mild mobility limitations and intact cognition. KW - exercise KW - dose response KW - walking capacity KW - cognitive function Y1 - 2021 U6 - https://doi.org/10.1159/000513505 SN - 0304-324X SN - 1423-0003 VL - 67 IS - 4 SP - 403 EP - 414 PB - Karger CY - Basel ER - TY - GEN A1 - Hirschmueller, Anja A1 - Baur, Heiner A1 - Braun, Sepp A1 - Kreuz, Peter C. A1 - Suedkamp, Norbert P A1 - Niemeyer, Philipp T1 - Rehabilitation after autologous chondrocyte implantation for isolated cartilage defects of the knee N2 - Autologous chondrocyte implantation for treatment of isolated cartilage defects of the knee has become well established. Although various publications report technical modifications, clinical results, and cell-related issues, little is known about appropriate and optimal rehabilitation after autologous chondrocyte implantation. This article reviews the literature on rehabilitation after autologous chondrocyte implantation and presents a rehabilitation protocol that has been developed considering the best available evidence and has been successfully used for several years in a large number of patients who underwent autologous chondrocyte implantation for cartilage defects of the knee. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 367 KW - autologous chondrocyte implantation KW - cartilage repair KW - cartilage defect KW - cell transplantation KW - knee joint KW - rehabilitation Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-403170 ER - TY - JOUR A1 - Herold, Fabian A1 - Theobald, Paula A1 - Gronwald, Thomas A1 - Rapp, Michael A. A1 - Müller, Notger Germar T1 - Going digital – a commentary on the terminology used at the intersection of physical activity and digital health JF - European review of aging and physical activity N2 - In recent years digital technologies have become a major means for providing health-related services and this trend was strongly reinforced by the current Coronavirus disease 2019 (COVID-19) pandemic. As it is well-known that regular physical activity has positive effects on individual physical and mental health and thus is an important prerequisite for healthy aging, digital technologies are also increasingly used to promote unstructured and structured forms of physical activity. However, in the course of this development, several terms (e.g., Digital Health, Electronic Health, Mobile Health, Telehealth, Telemedicine, and Telerehabilitation) have been introduced to refer to the application of digital technologies to provide health-related services such as physical interventions. Unfortunately, the above-mentioned terms are often used in several different ways, but also relatively interchangeably. Given that ambiguous terminology is a major source of difficulty in scientific communication which can impede the progress of theoretical and empirical research, this article aims to make the reader aware of the subtle differences between the relevant terms which are applied at the intersection of physical activity and Digital Health and to provide state-of-art definitions for them. KW - Digital Health KW - Electronic Health KW - Mobile Health KW - Telehealth KW - Telemedicine KW - Physical activity KW - Physical training KW - Aging Y1 - 2022 U6 - https://doi.org/10.1186/s11556-022-00296-y SN - 1861-6909 VL - 19 PB - Springer CY - Berlin ; Heidelberg ER - TY - JOUR A1 - Henschke, Jakob A1 - Zecher, Mahli Megan A1 - Mayer, Frank A1 - Engel, Tilman T1 - Contralateral repeated bout effect following preconditioning exercises BT - a systematic review JF - Sport sciences for health N2 - Background Recent studies indicate the existence of a repeated bout effect on the contralateral untrained limb following eccentric and isometric contractions. Aims This review aims to summarize the evidence for magnitude, duration and differences of this effect following isometric and eccentric preconditioning exercises. Methods Medline, Cochrane, and Web of science were searched from January 1971 until September 2020. Randomized controlled trials, case-control studies and cross-sectional studies were identified by combining keywords and synonyms (e.g., "contralateral", "exercise", "preconditioning", "protective effect"). At least two of the following outcome parameters were mandatory for study inclusion: strength, muscle soreness, muscle swelling, limb circumference, inflammatory blood markers or protective index (relative change of aforementioned measures). Results After identifying 1979 articles, 13 studies were included. Most investigations examined elbow flexors and utilized eccentric isokinetic protocols to induce the contralateral repeated bout effect. The magnitude of protection was observed in four studies, smaller values of the contralateral when compared to the ipsilateral repeated bout effect were noted in three studies. The potential mechanism is thought to be of neural central nature since no differences in peripheral muscle activity were observed. Time course was examined in three investigations. One study showed a smaller protective effect following isometric preconditioning when compared to eccentric preconditioning exercises. Conclusions The contralateral repeated bout effect demonstrates a smaller magnitude and lasts shorter than the ipsilateral repeated bout effect. Future research should incorporate long-term controlled trials including larger populations to identify central mechanisms. This knowledge should be used in clinical practice to prepare immobilized limbs prospectively for an incremental load. KW - musculoskeletal physiological phenomena KW - muscle damage KW - adaptation KW - Crossover KW - muscle soreness KW - isometric contraction Y1 - 2021 U6 - https://doi.org/10.1007/s11332-021-00804-0 SN - 1824-7490 SN - 1825-1234 VL - 18 IS - 1 SP - 1 EP - 10 PB - Soringer Italia CY - Milan ER - TY - JOUR A1 - Helm, Norman A1 - Prieske, Olaf A1 - Mühlbauer, Thomas A1 - Krüger, Tom A1 - Granacher, Urs T1 - Effects of judo-specific resistance training on kinetic and electromyographic parameters of pulling exercises in judo athletes T1 - Effekte eines judospezifischen Messplatztrainings auf kinetische und elektromyografische Parameter des Anreißens bei Wurfeingangsbewegungen von Judoka JF - Sportverletzung, Sportschaden : Grundlagen, Prävention, Rehabilitation N2 - Background In judo, rapid force production during pulling movements is an important component of athletic performance, which is why this capacity needs to be specifically exercised in judo. This study aimed at examining the effects of a judo-specific resistance training program using a judo ergometer system (PTJ) versus a traditional resistance training regime using a partner (PTP) on kinetics and muscle activity of judo-specific pulling exercises. Method Twenty-four male judo athletes (age: 22 +/- 4 years, training experience: 15 +/- 3 years) were randomly assigned to two groups. In a crossover design, the first group completed a 4-week PTJ followed by four weeks of PTP (each with three sessions per week). The second group conducted PTP prior to PTJ. PTJ and PTP were completed in addition to regular training. Before, 4 weeks and 8 weeks after training, tests were conducted to assess judo-specific pulling kinetics (i.e. maximal force, rate of force development [RFD], mechanical work) and electromyographic (EMG) shoulder/trunk muscle activity (i.e. biceps brachii muscle, deltoid muscle, trapezius muscle, erector spinae muscle) during pulling movements using a judo ergometer as well as unspecific strength tests (i.e. bench-pull, pull-ups). Results The statistical analysis revealed that in both groups ergometer pulling kinetics (p<.05, 0.83 <= d <= 1.77) and EMG activity (p<.05; 1.07 <= d <= 2.25) were significantly enhanced following 8 weeks of training. In addition, significantly larger gains in RFD, mechanical work, and EMG activity (i.e. deltoid muscle, erector spinae muscle, trapezius muscle) were found following PTJ compared to PTP (p<.05, 1.25 <= d <= 2.79). No significant enhancements were observed with the unspecific strength tests. Conclusion Our findings indicate that PTJ is superior to PTP regarding training-induced improvements in force production and muscle activity during judo-specific pulling exercises. Performance enhancements may partly be attributed to neural adaptations. No transfer effects on unspecific strength tests were detected following PTJ and PTP. N2 - Hintergrund Schnellkräftige Wurfeingangsbewegungen stellen im Judo entscheidende Voraussetzungen für den Wettkampferfolg dar, weshalb das Training der Anrissbewegung ein zentrales Element des judospezifischen Trainings darstellt. Das Ziel der Studie bestand darin, die Effekte eines Anrisstrainings mit einem Judoergometer-System (ATJ) gegenüber einem tradierten Anrisstraining mit Partner (ATP) auf kinetische und elektromyografische Parameter des Anreißens bei Wurfeingangsbewegungen von Judoka zu untersuchen. Methode Männliche leistungsorientierte Judoka (N = 24, Alter: 22 ± 4 Jahre; Trainingserfahrung: 15 ± 3 Jahre) wurden randomisiert in zwei Gruppen aufgeteilt. Im Crossover-Design absolvierte die erste Gruppe über vier Wochen ein ATJ gefolgt von vier Wochen ATP (je 3x/ Woche). Die zweite Gruppe führte beide Trainingsvarianten in umgekehrter Reihenfolge durch. ATJ und ATP wurden zusätzlich zum bestehenden Training absolviert. Vor dem Training sowie nach vier und nach acht Wochen Training wurden Tests zur Erfassung kinetischer Parameter (dynamisch-realisierte Maximalkraft, Explosivkraft, mechanische Arbeit) und elektromyografischer (EMG) Schulter-/ Rumpfmuskelaktivitäten (M. biceps brachii, M. deltoideus, M. trapezius, M. erector spinae) für die Hub- und Zugarmseite bei Wurfeingangsbewegungen am Judoergometer sowie sportartunspezifische Krafttests (d. h. Liegend-Anreißen, Klimmziehen) durchgeführt. Ergebnisse Die Ergebnisse der statistischen Analyse ergaben über den gesamten Interventionszeitraum (8 Wochen) für beide Trainingsgruppen signifikante Verbesserungen der kinetischen Parameter (p <,05; 0,83 ≤d≤ 1,77) und EMG-Aktivitäten (p <,05; 1,07 ≤d≤ 2,25). Darüber hinaus zeigten sich größere Zuwachsraten in der Explosivkraft, der mechanischen Arbeit und den Schulter-/Rumpfmuskelaktivitäten (M. deltoideus, M. erector spinae, M. trapezius) zugunsten von ATJ im Vergleich zu ATP (p <,05; 1,25 ≤d≤ 2,79). Für die sportartunspezifischen Kraftwerte wurden keine signifikanten Veränderungen festgestellt. Schlussfolgerung Die vorliegenden Ergebnisse zeigen, dass ATJ gegenüber ATP größere Steigerungsraten von kinetischen und elektromyografischen Parametern des Anreißens bei Wurfeingangsbewegungen von Judoka bewirkt. Die trainingsbedingten Leistungssteigerungen scheinen zumindest teilweise auf neuronalen Anpassungen zu beruhen. KW - combat sport KW - athletic performance KW - specific strength training KW - surface electromyography KW - Kampfsport KW - sportliche Leistung KW - spezifisches Krafttraining KW - Oberflächenelektromyografie Y1 - 2018 U6 - https://doi.org/10.1055/s-0043-122781 SN - 0932-0555 SN - 1439-1236 VL - 32 IS - 2 SP - 134 EP - 142 PB - Thieme CY - Stuttgart ER - TY - JOUR A1 - Hammami, Raouf A1 - Chaabene, Helmi A1 - Kharrat, Fatma A1 - Werfelli, Hanen A1 - Duncan, Michael A1 - Rebai, Haithem A1 - Granacher, Urs T1 - Acute effects of different balance exercise types on selected measures of physical fitness in youth female volleyball players JF - BMC Sports Science, Medicine and Rehabilitation N2 - Background Earlier studies have shown that balance training (BT) has the potential to induce performance enhancements in selected components of physical fitness (i.e., balance, muscle strength, power, speed). While there is ample evidence on the long-term effects of BT on components of physical fitness in youth, less is known on the short-term or acute effects of single BT sessions on selected measures of physical fitness. Objective To examine the acute effects of different balance exercise types on balance, change-of-direction (CoD) speed, and jump performance in youth female volleyball players. Methods Eleven female players aged 14 years participated in this study. Three types of balance exercises (i.e., anterior, posterolateral, rotational type) were conducted in randomized order. For each exercise, 3 sets including 5 repetitions were performed. Before and after the performance of the balance exercises, participants were tested for their static balance (center of pressure surface area [CoP SA] and velocity [CoP V]) on foam and firm surfaces, CoD speed (T-Half test), and vertical jump height (countermovement jump [CMJ] height). A 3 (condition: anterior, mediolateral, rotational balance exercise type) × 2 (time: pre, post) analysis of variance was computed with repeated measures on time. Results Findings showed no significant condition × time interactions for all outcome measures (p > 0.05). However, there were small main effects of time for CoP SA on firm and foam surfaces (both d = 0.38; all p < 0.05) with no effect for CoP V on both surface conditions (p > 0.05). For CoD speed, findings showed a large main effect of time (d = 0.91; p < 0.001). However, for CMJ height, no main effect of time was observed (p > 0.05). Conclusions Overall, our results indicated small-to-large changes in balance and CoD speed performances but not in CMJ height in youth female volleyball players, regardless of the balance exercise type. Accordingly, it is recommended to regularly integrate balance exercises before the performance of sport-specific training to optimize performance development in youth female volleyball players. KW - Postural stability KW - Conditioning activity KW - Short‐term effect KW - Team sports KW - Youth Y1 - 2021 U6 - https://doi.org/10.1186/s13102-021-00249-5 SN - 1758-2555 VL - 13 PB - BioMed Central CY - London ER - TY - GEN A1 - Hammami, Raouf A1 - Chaabene, Helmi A1 - Kharrat, Fatma A1 - Werfelli, Hanen A1 - Duncan, Michael A1 - Rebai, Haithem A1 - Granacher, Urs T1 - Acute effects of different balance exercise types on selected measures of physical fitness in youth female volleyball players T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - Background Earlier studies have shown that balance training (BT) has the potential to induce performance enhancements in selected components of physical fitness (i.e., balance, muscle strength, power, speed). While there is ample evidence on the long-term effects of BT on components of physical fitness in youth, less is known on the short-term or acute effects of single BT sessions on selected measures of physical fitness. Objective To examine the acute effects of different balance exercise types on balance, change-of-direction (CoD) speed, and jump performance in youth female volleyball players. Methods Eleven female players aged 14 years participated in this study. Three types of balance exercises (i.e., anterior, posterolateral, rotational type) were conducted in randomized order. For each exercise, 3 sets including 5 repetitions were performed. Before and after the performance of the balance exercises, participants were tested for their static balance (center of pressure surface area [CoP SA] and velocity [CoP V]) on foam and firm surfaces, CoD speed (T-Half test), and vertical jump height (countermovement jump [CMJ] height). A 3 (condition: anterior, mediolateral, rotational balance exercise type) × 2 (time: pre, post) analysis of variance was computed with repeated measures on time. Results Findings showed no significant condition × time interactions for all outcome measures (p > 0.05). However, there were small main effects of time for CoP SA on firm and foam surfaces (both d = 0.38; all p < 0.05) with no effect for CoP V on both surface conditions (p > 0.05). For CoD speed, findings showed a large main effect of time (d = 0.91; p < 0.001). However, for CMJ height, no main effect of time was observed (p > 0.05). Conclusions Overall, our results indicated small-to-large changes in balance and CoD speed performances but not in CMJ height in youth female volleyball players, regardless of the balance exercise type. Accordingly, it is recommended to regularly integrate balance exercises before the performance of sport-specific training to optimize performance development in youth female volleyball players. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 713 KW - Postural stability KW - Conditioning activity KW - Short‐term effect KW - Team sports KW - Youth Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-517477 SN - 1866-8364 IS - 713 ER - TY - JOUR A1 - Hagoort, Iris A1 - Vuillerme, Nicolas A1 - Hortobágyi, Tibor A1 - Lamoth, Claudine J. C. T1 - Outcome-dependent effects of walking speed and age on quantitative and qualitative gait measures JF - Gait & posture N2 - Background: Walking speed predicts many clinical outcomes in old age. However, a comprehensive assessment of how walking speed affects accelerometer based quantitative and qualitative gait measures in younger and older adults is lacking. Research question: What is the relationship between walking speed and quantitative and qualitative gait outcomes in younger and older adults? Methods: Younger (n = 27, age: 21.6) and older participants (n = 27, age: 69.5) completed 340 steps on a treadmill at speeds of 0.70 to a maximum of 1.75 m.s(-1). We used generalized additive mixed models to determine the relationship between walking speed and quantitative (stride length, stride time, stride frequency and their variability) and qualitative (stride regularity, stability, smoothness, symmetry, synchronization, predictability) gait measures extracted from trunk accelerations. Results: The type of relationship between walking speed and the majority of gait measures (quantitative and qualitative) was characterized as logarithmic, with more prominent speed-effects at speeds below 1.20 m.s(-1). Changes in quantitative measures included shorter strides, longer stride times, and a lower stride frequency, with more variability at lower speeds independent of age. For qualitative measures, we found a decrease in gait symmetry, stability and regularity in all directions with decreasing speeds, a decrease in gait predictability (Vertical, V, anterior-posterior, AP) and stronger gait synchronization (AP-mediolateral, ML, AP-V), and direction dependent effects of gait smoothness, which decreased in V direction, but increased in AP and ML directions with decreasing speeds. We found outcome-dependent effects of age on the quantitative and qualitative gait measures, with either no differences between age-groups, age-related differences that existed regardless of speed, and age-related differences in the type of relationship with walking speed. Significance: The relationship between walking speed and quantitative and qualitative gait measures, and the effects of age on this relationship, depends on the type of gait measure studied. KW - Gait quality and quantity KW - Aging KW - Walking speed KW - Treadmill KW - Generalized KW - additive mixed models Y1 - 2022 U6 - https://doi.org/10.1016/j.gaitpost.2022.01.001 SN - 0966-6362 SN - 1879-2219 VL - 93 SP - 39 EP - 46 PB - Elsevier CY - Clare ER - TY - JOUR A1 - Hadzic, Miralem A1 - Eichler, Sarah A1 - Völler, Heinz A1 - Salzwedel, Annett T1 - Akzeptanz und Nutzung eines telemedizinischen Rehabilitationsprogramms für Patienten mit Knie- oder Hüft-Totalendoprothese JF - Bewegungstherapie und Gesundheitssport : B & G ; offizielles Organ des Deutschen Verbandes für Gesundheitssport und Sporttherapie e.V. (DVGS) N2 - Objective of the study: The long-term use of telemedical programs depends not only on their effectiveness, but also on patient acceptance and satisfaction. The effectiveness of telemedical exercise therapy for patients after implantation of a total knee or hip prosthesis and subsequent rehabilitation has already been examined in a randomized controlled study. This article focuses on the patient's acceptance and usage behaviour with regard to the tele-rehabilitation system. Methodology: 48 patients (53 +/- 7 years; 26 women; 35 hip/13 knee TEP) were questioned after a three-month telemedical movement therapy using the Telehealth Usability Questionnaire (TUQ) to determine the acceptance of the technology. The questionnaire consisted of 21 items (seven-point Likert scale) in six scales (e. g. usefulness, quality of interactions, reliability). System-specific questions were summarized on an additional scale. The results were presented as a percentage of the scale (100 estimates complete agreement). The usage behaviour was examined using system-generated process data for training and integrated voice/text messages. Results: The TUQ scales "Usefulness" (Mdn 95.2) and "Ease of use and learnability" (Mdn 92.9) were rated the highest, while "Reliability" (Mdn 57.1) and "Quality of interactions" ( Mdn 71.4) showed the lowest levels. The system-specific scale was placed in the upper quartile (Mdn 85.7). In the first week, 39 patients (81%) and in the second 45 patients (94%) performed at least one training exercise with the system. The proportion of active patients (>= 1 exercise/week) decreased in the further course to 75% (n=36) in the 7th week and 48% (n=23) in the 12th week. The system communication options were initially used frequently after the start of therapy: in the first week, 42 patients (88%) sent messages, 47 patients (98%) received messages from their therapist respectively. In week 7, 9 (19%) and 13 (27%) patients sent/received messages via the system respectively. Conclusion: Most of the patients perceived telemedical movement therapy as useful and user-friendly and seemed to be largely satisfied with the system. This proved to be well suited for short-term use of 6 to 8 weeks following subsequent rehabilitation. N2 - Ziel der Studie: Die langfristige Nutzung telemedizinischer Angebote hängt nicht nur von deren Wirksamkeit, sondern auch von der Akzeptanz und Zufriedenheit der Patienten ab. Für eine telemedizinische Bewegungstherapie für Patienten nach Implantation einer Knie- oder Hüft-Totalendoprothese und erfolgter Anschlussrehabilitation wurde die Wirksamkeit bereits in einer randomisiert kontrollierten Studie untersucht. Dieser Beitrag fokussiert die Akzeptanz und das Nutzungsverhalten der Patienten hinsichtlich des eingesetzten telerehabilitativen Systems. Methodik: Zur Erfassung der Technikakzeptanz wurden 48 Patienten (53±7 Jahre; 26 Frauen; 35 Hüft-/13 Knie-TEP) im Anschluss an eine dreimonatige telemedizinische Bewegungstherapie mittels des Telehealth Usability Questionnaire befragt. Der Fragebogen besteht aus 21 Items (siebenstufige Likert-Skala) in sechs Skalen (z. B. Nützlichkeit, Qualität der Interaktionen, Verlässlichkeit). In einer zusätzlichen Skala wurden systemspezifische Fragen zusammengefasst. Die Ergebnisse wurden als Skalenprozent (100 ≙ vollkommene Zustimmung) dargestellt. Das Nutzungsverhalten wurde anhand systemgenerierter Prozessdaten zum Training sowie zu integrierten Sprach-/Textnachrichten untersucht. Ergebnisse: Die TUQ-Skalen „Nützlichkeit“ (Mdn 95,2) sowie „Benutzerfreundlichkeit und Erlernbarkeit“ (Mdn 92,9) wurden am höchsten bewertet, während die „Verlässlichkeit“ (Mdn 57,1) und „Qualität der Interaktionen“ (Mdn 71,4) die geringsten Ausprägungen zeigten. Die systemspezifische Skala wurde im oberen Quartil eingeordnet (Mdn 85,7). In der ersten Woche führten 39 Patienten (81%), in der zweiten 45 Patienten (94%) mindestens eine Trainingsübung mit dem System durch. Der Anteil aktiver Patienten (≥1 Übung/Woche) reduzierte sich im weiteren Verlauf auf 75% (n=36) in der 7. Woche und 48% (n=23) in der 12. Woche. Die systemeigenen Kommunikationsmöglichkeiten wurden nach Therapiestart zunächst häufig genutzt: in der ersten Woche sendeten 42 Patienten (88%) Nachrichten, 47 Patienten (98%) erhielten Nachrichten von ihrem Therapeuten. In der 7. Woche sendeten/erhielten 9 (19%) bzw. 13 (27%) Patienten Nachrichten über das System. Schlussfolgerung: Die Patienten nahmen die telemedizinische Bewegungstherapie überwiegend als nützlich und benutzerfreundlich wahr und schienen im Wesentlichen mit dem System zufrieden, das sich damit für den kurzfristigen Einsatz von 6 bis 8 Wochen im Anschluss an eine Anschlussrehabilitation als gut geeignet zeigte. T2 - Acceptance and use of a telemedical rehabilitation program for patients with total knee or hip replacement KW - Telemedicine KW - tele-rehabilitation KW - acceptance KW - use KW - orthopaedic KW - rehabilitation KW - Telemedizin KW - Telerehabilitation KW - Akzeptanz KW - Nutzung KW - orthopädische Rehabilitation Y1 - 2022 U6 - https://doi.org/10.1055/a-1714-3629 SN - 1613-0863 SN - 1613-3269 VL - 38 IS - 01 SP - 20 EP - 25 PB - Thieme CY - Stuttgart ER - TY - THES A1 - Gutschow, Ivonne T1 - Auswirkungen des Cellvas-Mikrostromverfahrens auf die Leistungsfähigkeit bei Sportlern : Analyse möglicher Effekte auf ausgewählte psycho-physische Belastungsparameter im Leistungssport T1 - Cellvas effects of micro current system to the performance of athletes : analysis of possible effects on selected psycho-physical stress parameters in competitive N2 - Hohe Leistungsansprüche im Wettkampfsport erfordern von den Athleten eine hohe sportliche Belastbarkeit. Möglichkeiten die Trainingsumfänge und -intensitäten zu erhöhen, sind z.T. ausgeschöpft. So bestehen nach wie vor Bestrebungen neue Wege zu finden, um mögliche Leistungsreserven zu erschließen. Elektrotherapieverfahren haben sich im klinischen Alltag, u.a. zur Behandlung von Traumata, bewährt und werden häufig zum Zweck der Analgesierung, Verbesserung der Gewebedurchblutung und zur Muskelstimulation angewandt. Deren Einsatz im adjuvanten Bereich der Trainingsbegleitung wurde bislang nur vereinzelt beschrieben. In der vorliegenden Studie wurden die Auswirkungen einer elektromagnetischen Anwendungsform auf ausgewählte psycho-physische Parameter untersucht (Kontrollgruppenvergleich mit placebokontrolliertem Design), um Aussagen über praxisrelevante Ansätze zur trainingsunterstützenden Betreuung abzuleiten. Es stellte sich die Frage, ob eine Intervention (15 x / 4 Wo.) mit frequenzmodulierten Wechselströmen im vorwiegend niederfrequenten Wirkungsspektrum (0-10000Hz, 5 μA / cm², CellVAS®) zu einer Beeinflussung der untersuchten Parameter führen und dahingehend nachhaltige leistungsfördernde oder -reduzierende Effekte erzielt werden könnten. Des Weiteren sollte geprüft werden, inwiefen die erhobenen Parameter (PWC170, Squat-Jump, Lateralflexion der Wirbelsäule und SF36®) aussagekräftig genug sind. Die Wirksamkeit des Applikationsform wurde im Prä-Post-Vergleich vor (T1), nach (T2) und 4 Wo. nach Abschluss (T3, Nachhaltigkeit) der Intervention analysiert. Die Teilnehmer der Kontrollgruppe erhielten vergleichbare Applikationen im Placebomodus. Das Probandenkollektiv bestand aus gesunden Leistungssportlern, deren Sportarten einen hohen Kraftausdaueranteil enthielten (n=127). Die Gruppenzuteilung erfolgte teilrandomisiert in Haupt- (HG) und Kontrollgruppe (KG). Zudem wurden die Gruppen zusätzlich geschlechtsspezifisch getrennt. Im Untersuchungsverlauf ließen sich Veränderungen für die Leistungsparameter PWC170 und Squat Jump erkennen. Inwiefern diese Abweichungen auf den Einfluss der Intervention mit frequenzmodulierten Wechselströmen im niederfrequenten Wirkungsspektrum zurückzuführen sind, konnte in dieser Untersuchung nicht eindeutig geklärt werden. Die nachgewiesenen Effekte ließen sich nach den zu Grunde liegenden wissenschaftlichen Standards nicht statistisch valide belegen. Der wissenschaftliche Nachweis einer mögliche Leistungsveränderung konnte nicht abschließend erbracht werden. Im therapeutischen Bereich hat die untersuchte Applikationsform, auf Basis der bestehen Studienlage, ihre Anwendung gefunden und kann bedenkenlos verwendet werden. Für den Einsatz als unterstützendes Verfahren in der sportlichen Praxis besteht nach wie vor Bedarf an validen, randomisierten Studien, die die Wirksamkeit der Applikationsform auf psycho-physische Parameter von Athleten nachhaltig belegen, bevor sie in der sportlichen Praxis Anwendung finden sollten. N2 - High performance requirements in competitive sports require the athlete a high level of aerobic fitness. The training opportunities and scopes intensities increase, are z.T. exhausted. To persist The attempt to find new ways to potential performance reserves additional market opportunities. Electrotherapy procedures have been in clinical practice, including to treatment of trauma, and are often proved for the purpose of analgesia, improvement of tissue perfusion and muscle stimulation applied. Their use in the field of adjuvant training support has so far been described only sporadically. In the present study, the effects were a electromagnetic application form on selected psycho-physical parameters examined (control group compared with placebo-controlled design) to statements about practical approaches to derive training support care. It turned the whether an intervention (15 x / 4 wk) with frequency currents in predominantly low-spectrum (0-10000Hz, 5 uA / cm ², CellVAS ®) to influence the parameters investigated, and so lead sustainable performance-enhancing or-reducing effects could be achieved. It should also be examined to what extent the parameters collected (PWC170, squat-jump, lateral flexion of the spine and SF36 ®) meaningful enough. The effectiveness of the application form was in the pre-post comparison before (T1), after (T2) and 4 wk) after (T3, sustainability of intervention analysis. The participants in the control group received similar applications in the placebo mode. The group consisted of healthy volunteers, athletes, whose endurance sports a high proportion of included (n = 127). The group allocation was partially randomizedin in main-(HG) and ontrol group (KG). In addition, the groups were additionally gender separately. In the course of the investigation could be changes for the performance parameters and PWC170 Squat Jump recognize. How far this Deviations on the impact of the intervention with frequency Due to currents in the low frequency spectrum are, could not be clarified clearly in this study. The effects could be detected by the underlying academic standards show not statistically valid. The scientific evidence of a possible change in performance could not be finally delivered. In the therapeutic range has examined the application form, are based on the Study location, found their application and can be safely used will. For use as a supportive procedure in the sports practice, there remains a need for valid, randomized studies evaluating the effectiveness of the application form on psycho-physical parameters of athletes demonstrate a sustained before Refer to the athletic practice should apply. KW - Mikrostrom KW - Cellvas KW - sportliche Leistungsfähigkeit KW - micro current KW - cellvas KW - psycho-physical parameters Y1 - 2009 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-40224 ER - TY - GEN A1 - Granacher, Urs A1 - Hortobágyi, Tibor T1 - Exercise to improve mobility in healthy aging T2 - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 897 Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-432419 SN - 1866-8372 IS - 897 ER - TY - JOUR A1 - El-Ashker, Said A1 - Chaabene, Helmi A1 - Negra, Yassine A1 - Prieske, Olaf A1 - Granacher, Urs T1 - Cardio-Respiratory Endurance Responses Following a Simulated 3 x 3 Minutes Amateur Boxing Contest in Elite Level Boxers JF - Sports N2 - This study aimed at examining physiological responses (i.e., oxygen uptake [VO2] and heart rate [HR]) to a semi-contact 3 x 3-min format, amateur boxing combat simulation in elite level male boxers. Eleven boxers aged 21.4 +/- 2.1 years (body height 173.4 +/- 3.7, body mass 74.9 +/- 8.6 kg, body fat 12.1 +/- 1.9, training experience 5.7 +/- 1.3 years) volunteered to participate in this study. They performed a maximal graded aerobic test on a motor-driven treadmill to determine maximum oxygen uptake (VO2max), oxygen uptake (VO2AT) and heart rate (HRAT) at the anaerobic threshold, and maximal heart rate (HRmax). Additionally, VO2 and peak HR (HRpeak) were recorded following each boxing round. Results showed no significant differences between VO2max values derived from the treadmill running test and VO2 outcomes of the simulated boxing contest (p > 0.05, d = 0.02 to 0.39). However, HRmax and HRpeak recorded from the treadmill running test and the simulated amateur boxing contest, respectively, displayed significant differences regardless of the boxing round (p < 0.01, d = 1.60 to 3.00). In terms of VO2 outcomes during the simulated contest, no significant between-round differences were observed (p = 0.19, d = 0.17 to 0.73). Irrespective of the boxing round, the recorded VO2 was >90% of the VO2max. Likewise, HRpeak observed across the three boxing rounds were >= 90% of the HRmax. In summary, the simulated 3 x 3-min amateur boxing contest is highly demanding from a physiological standpoint. Thus, coaches are advised to systematically monitor internal training load for instance through rating of perceived exertion to optimize training-related adaptations and to prevent boxers from overreaching and/or overtraining. KW - aerobic metabolism KW - physiological strain KW - striking combat sports KW - elite athletes Y1 - 2018 U6 - https://doi.org/10.3390/sports6040119 SN - 2075-4663 VL - 6 IS - 4 PB - MDPI CY - Basel ER - TY - GEN A1 - El-Ashker, Said A1 - Chaabene, Helmi A1 - Negra, Yassine A1 - Prieske, Olaf A1 - Granacher, Urs T1 - Cardio-Respiratory endurance responses following a simulated 3 x 3 minutes amateur boxing contest in elite level boxers T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - This study aimed at examining physiological responses (i.e., oxygen uptake [VO2] and heart rate [HR]) to a semi-contact 3 x 3-min format, amateur boxing combat simulation in elite level male boxers. Eleven boxers aged 21.4 +/- 2.1 years (body height 173.4 +/- 3.7, body mass 74.9 +/- 8.6 kg, body fat 12.1 +/- 1.9, training experience 5.7 +/- 1.3 years) volunteered to participate in this study. They performed a maximal graded aerobic test on a motor-driven treadmill to determine maximum oxygen uptake (VO2max), oxygen uptake (VO2AT) and heart rate (HRAT) at the anaerobic threshold, and maximal heart rate (HRmax). Additionally, VO2 and peak HR (HRpeak) were recorded following each boxing round. Results showed no significant differences between VO2max values derived from the treadmill running test and VO2 outcomes of the simulated boxing contest (p > 0.05, d = 0.02 to 0.39). However, HRmax and HRpeak recorded from the treadmill running test and the simulated amateur boxing contest, respectively, displayed significant differences regardless of the boxing round (p < 0.01, d = 1.60 to 3.00). In terms of VO2 outcomes during the simulated contest, no significant between-round differences were observed (p = 0.19, d = 0.17 to 0.73). Irrespective of the boxing round, the recorded VO2 was >90% of the VO2max. Likewise, HRpeak observed across the three boxing rounds were >= 90% of the HRmax. In summary, the simulated 3 x 3-min amateur boxing contest is highly demanding from a physiological standpoint. Thus, coaches are advised to systematically monitor internal training load for instance through rating of perceived exertion to optimize training-related adaptations and to prevent boxers from overreaching and/or overtraining. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 675 KW - aerobic metabolism KW - physiological strain KW - striking combat sports KW - elite athletes Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-472338 SN - 1866-8364 IS - 675 ER - TY - JOUR A1 - Dobberke, Jeanette A1 - Baritello, Omar A1 - Hadzic, Miralem A1 - Völler, Heinz A1 - Eichler, Sarah A1 - Salzwedel, Annett T1 - Test-retest reliability of center of pressure measures for postural control assessment in older cardiac patients JF - Gait & posture : official journal of Gait and Clinical Movement Analysis Society (GCMAS) and European Society of Movement Analysis in Adults and Children (ESMAC) N2 - Background Elderly patients are a growing population in cardiac rehabilitation (CR). As postural control declines with age, assessment of impaired balance is important in older CR patients in order to predict fall risk and to initiate counteracting steps. Functional balance tests are subjective and lack adequate sensitivity to small differences, and are further subject to ceiling effects. A quantitative approach to measure postural control on a continuous scale is therefore desirable. Force plates are already used for this purpose in other clinical contexts, therefore could be a promising tool also for older CR patients. However, in this population the reliability of the assessment is not fully known. Research question Analysis of test-retest reliability of center of pressure (CoP) measures for the assessment of postural control using a force plate in older CR patients. Methods 156 CR patients (> 75 years) were enrolled. CoP measures (path length (PL), mean velocity (MV), and 95% confidence ellipse area (95CEA)) were analyzed twice with an interval of two days in between (bipedal narrow stance, eyes open (EO) and closed (EC), three trials for each condition, 30 s per trial), using a force plate. For test-retest reliability estimation absolute differences (& UDelta;: T0-T1), intraclass correlation coefficients (ICC) with 95% confidence intervals, standard error of measurement and minimal detectable change were calculated. Results Under EO condition ICC were excellent for PL and MV (0.95) and good for 95CEA (0.88) with & UDelta; of 10.1 cm (PL), 0.3 cm/sec (MV) and 1.5 cm(2 )(95CEA) respectively. Under EC condition ICC were excellent (> 0.95) for all variables with larger & UDelta; (PL: 21.7 cm; MV: 0.7 cm/sec; 95CEA: 2.4 cm(2)) Significance In older CR patients, the assessment of CoP measures using a force plate shows good to excellent test retest reliability. KW - Cardiac rehabilitation KW - Older patients KW - Postural control KW - Test-retest KW - reliability KW - Force plate Y1 - 2022 U6 - https://doi.org/10.1016/j.gaitpost.2021.12.011 SN - 0966-6362 SN - 1879-2219 VL - 92 SP - 359 EP - 363 PB - Elsevier Science CY - Amsterdam ER - TY - GEN A1 - De Souza Silveira, Raul A1 - Carlsohn, Anja A1 - Langen, Georg A1 - Mayer, Frank A1 - Scharhag-Rosenberger, Friederike T1 - Reliability and day-to-day variability of peak fat oxidation during treadmill ergometry T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - Background: Exercising at intensities where fat oxidation rates are high has been shown to induce metabolic benefits in recreational and health-oriented sportsmen. The exercise intensity (Fat peak ) eliciting peak fat oxidation rates is therefore of particular interest when aiming to prescribe exercise for the purpose of fat oxidation and related metabolic effects. Although running and walking are feasible and popular among the target population, no reliable protocols are available to assess Fat peak as well as its actual velocity (V PFO ) during treadmill ergometry. Our purpose was therefore, to assess the reliability and day-to-day variability of V PFO and Fat peak during treadmill ergometry running. Methods: Sixteen recreational athletes (f = 7, m = 9; 25 ± 3 y; 1.76 ± 0.09 m; 68.3 ± 13.7 kg; 23.1 ± 2.9 kg/m 2 ) performed 2 different running protocols on 3 different days with standardized nutrition the day before testing. At day 1, peak oxygen uptake (VO 2peak ) and the velocities at the aerobic threshold (V LT ) and respiratory exchange ratio (RER) of 1.00 (V RER ) were assessed. At days 2 and 3, subjects ran an identical submaximal incremental test (Fat-peak test) composed of a 10 min warm-up (70 % V LT ) followed by 5 stages of 6 min with equal increments (stage 1 = V LT , stage 5 = V RER ). Breath-by-breath gas exchange data was measured continuously and used to determine fat oxidation rates. A third order polynomial function was used to identify V PFO and subsequently Fat peak . The reproducibility and variability of variables was verified with an int raclass correlation coef ficient (ICC), Pearson ’ s correlation coefficient, coefficient of variation (CV) an d the mean differences (bias) ± 95 % limits of agreement (LoA). Results: ICC, Pearson ’ s correlation and CV for V PFO and Fat peak were 0.98, 0.97, 5.0 %; and 0.90, 0.81, 7.0 %, respectively. Bias ± 95 % LoA was − 0.3 ± 0.9 km/h for V PFO and − 2±8%ofVO 2peak for Fat peak. Conclusion: In summary, relative and absolute reliability indicators for V PFO and Fat peak were found to be excellent. The observed LoA may now serve as a basis for future training prescriptions, although fat oxidation rates at prolonged exercise bouts at this intensity still need to be investigated. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 423 KW - peak fat oxidation KW - reliability KW - variability KW - running KW - treadmill ergometry Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-407334 IS - 423 ER - TY - JOUR A1 - Davies, Michael J. A1 - Drury, Benjamin A1 - Ramirez-Campillo, Rodrigo A1 - Chaabene, Helmi A1 - Moran, Jason T1 - Effect of plyometric training and biological maturation on jump and change of direction ability in female youth JF - Journal of strength and conditioning research : the research journal of the NSCA / National Strength & Conditioning Association N2 - Biological maturation has been shown to affect male youths' responses to plyometric training (PT). However, to date, no researcher has examined the effect of maturation on the effects of PT in female youth. We undertook the first controlled intervention study to examine this, focusing on adaptive responses to countermovement jump (CMJ), reactive strength index (RSI), and change of direction (COD) performance in groups of female youth divided by maturation status (years from peak height velocity [PHV]). The training program lasted 7 weeks with subjects undertaking 2 sessions of PT per week. In the mid-PHV group, there was a small increase (effect size; 90% confidence interval = 0.40; -0.23 to 1.03) in CMJ performance. No changes were observed in the post-PHV group (0.02; -0.68 to 0.72). For RSI, there was a moderate increase in the mid-PHV group (0.94; 0.29-1.59) with only a trivial increase in the post-PHV group (0.06; -0.65 to 0.76). The intervention exerted no positive effect on COD performance in any group. Plyometric training seems to enhance CMJ and RSI in female youth, although the magnitude of adaptation could be affected by maturation status. A twice-per-week program of multidirectional jumping and hopping, with bilateral and unilateral components, can be used as a preparatory precursor to physical education classes or recreational sport. KW - girls KW - exercise KW - sport KW - athlete Y1 - 2021 U6 - https://doi.org/10.1519/JSC.0000000000003216 SN - 1064-8011 SN - 1533-4287 VL - 35 IS - 10 SP - 2690 EP - 2697 PB - Lippincott Williams & Wilkins CY - Philadelphia ER - TY - THES A1 - Chan, Yuan-Shuo T1 - Zum Zusammenhang zwischen posturaler Balance und kognitiven bzw. somatischen Faktoren T1 - The correlation between postural balance and cognitive/ somatic factors N2 - Balance ist als die koordinative Fähigkeit anzusehen, die am meisten durch das Sinnes- und Nervensystem determiniert ist. Damit könnte sie als Indikator für Funktionseinschränkungen des Nervensystems - etwa bei Lernstörungen - von Wert sein. Aussagen über Zusammenhänge zwischen Balance und Kognition werden vielfach diskutiert, sind jedoch noch nicht hinreichend wissenschaftlich gesichert. Hieraus wird die zentrale Zielstellung der Arbeit abgeleitet, das Wissen über somatische und psychische Determinanten von Balance zu erweitern. Betrachtet werden daher bei Vorschulkindern mögliche Zusammenhänge mit dem Geschlecht, mit den anthropometrischen Parametern Körperhöhe und Fußgröße, mit Statikstörungen des Beckens und der Intelligenzleistung. An der Studie nahmen insgesamt 201 drei- bzw. vierjährige Kinder sowie 148 fünf- bzw. sechsjährige Kinder teil. Die Balancefähigkeit wurde mit Hilfe einer Kraftmomentenplattform sowie eines klinischen Tests erfasst und mit anthropometrischen Parametern, qualitativen statischen Befunden bzw. den Ergebnissen des BIVA-Intelligenztests nach SCHAARSCHMIDT verglichen. Für die Auswertung der Balanceparameter wurden sowohl lineare als auch nichtlineare Verfahren eingesetzt, die zum Teil gegenläufige Trends in Bezug auf Zusammenhänge lieferten. Im Ergebnis konnte ein starker Einfluss des Geschlechts nachgewiesen werden. Mädchen zeigten eine bessere Balanceleistung als Jungen sowohl bei 3-Jährigen als auch bei 6-Jährigen. Dies wird als Beleg für den geschlechtsspezifischen Vorsprung der sensomotorischen Entwicklung bei den Mädchen im Alter von 3 bis 6 Jahren angesehen. Außerdem gab es einige Hinweise auf einen Zusammenhang mit der Körperhöhe bzw. Fußlänge. Ein Zusammenhang mit den Umstellungen des ersten Gestaltwandels wird vermutet. Die Daten sprechen für einen statistisch schwachen Einfluss von Störungen der Beckenstatik (Beckenverwringung) auf die Balance bei den Kindern. Es wird vermutet, dass die Verrechnung Balance relevanter Inputs durch nozizeptive Impulse beeinträchtig werden kann. Dies könnte Anlass sein, diesen Aspekt bei Funktionsstörungen mit zu berücksichtigen. Signifikante Zusammenhänge mit Ergebnissen des BIVA-Intelligenztests konnten kaum gefunden werden. Allerdings fallen überzufällig viele Mittelwertvergleiche in Richtung der Hypothese aus, erreichen jedoch nicht Signifikanzniveau. Dies könnte ein Hinweis auf einen schwachen Zusammenhang darstellen, der jedoch mit einer größeren Gruppe noch bestätigt werden müsste. Weitere Forschung auf diesem Gebiet ist erforderlich. Sollte hinreichende Evidenz erreicht werden können, so könnte in der Förderung koordinativer Fähigkeiten und insbesondere der posturalen Balance eine wichtige pädagogische Reserve liegen. N2 - Balance is considered a coordinative ability, which is mostly affected by the sensory and nervous systems. It can be used as an indicator for the functional ability of the nervous system, such as learning disability. Although the relationship between balance and cognition has long been postulated, this interaction has not yet been scientifically well established. The aim of this study is to examine the somatic and psychological determinants of balance. Preschool children were used to analyse the balance-cognition relationship with respect to gender, anthropometric parameters of body height and foot length, pelvic static and intelligence ability. 201 three to four years old children, as well as 148 five to six years old children, were used in this study. A clinical test involving a force moment platform was used to examine the balance ability. Results obtained were compared with specific anthropometric parameters and findings obtained from the BIVA-intelligent tests (SCHAARSCHMIDT). In the results, there is a strong effect of gender on balance. Girls showed a better balance ability than boys in the age groups of three and six years old. This finding provides evidence of an earlier gender specific advantage of sensor-motor development in girls between the ages of 3 to 6 years old. A relationship between postural balance and body height/ foot length was found. This may be attributed to the transposition of the body developmental changes. The results show a weak statistical effect of pelvic static disorders on balance in children. It can be suggested that inputs through the nociceptive impulse pathway can have a negative effect on balance. This can be factored as an aspect of a function disorder. Slight significant relationship could be found from the results of BIVA-intelligent tests. This can provide information on the weak relationship, which might show in larger group size. Further studies in this research area are necessary. Sufficient evidence should be reached, regarding the support of coordination ability and particularly postural balance, and the relationship could play an important role in education KW - Sensomotorik KW - Gleichgewicht KW - Intelligenz KW - Balance KW - Kind KW - Kognition KW - Somatik KW - balance KW - cognition KW - sensorimotor function KW - child Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-10237 ER - TY - GEN A1 - Chaabene, Helmi A1 - Prieske, Olaf A1 - Lesinski, Melanie A1 - Sandau, Ingo A1 - Granacher, Urs T1 - Short-term seasonal development of anthropometry, body composition, physical fitness, and sport-specific performance in young olympic weightlifters T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - The aim of this study is to monitor short-term seasonal development of young Olympic weightlifters’ anthropometry, body composition, physical fitness, and sport-specific performance. Fifteen male weightlifters aged 13.2 ± 1.3 years participated in this study. Tests for the assessment of anthropometry (e.g., body-height, body-mass), body-composition (e.g., lean-body-mass, relative fat-mass), muscle strength (grip-strength), jump performance (drop-jump (DJ) height, countermovement-jump (CMJ) height, DJ contact time, DJ reactive-strength-index (RSI)), dynamic balance (Y-balance-test), and sport-specific performance (i.e., snatch and clean-and-jerk) were conducted at different time-points (i.e., T1 (baseline), T2 (9 weeks), T3 (20 weeks)). Strength tests (i.e., grip strength, clean-and-jerk and snatch) and training volume were normalized to body mass. Results showed small-to-large increases in body-height, body-mass, lean-body-mass, and lower-limbs lean-mass from T1-to-T2 and T2-to-T3 (∆0.7–6.7%; 0.1 ≤ d ≤ 1.2). For fat-mass, a significant small-sized decrease was found from T1-to-T2 (∆13.1%; d = 0.4) and a significant increase from T2-to-T3 (∆9.1%; d = 0.3). A significant main effect of time was observed for DJ contact time (d = 1.3) with a trend toward a significant decrease from T1-to-T2 (∆–15.3%; d = 0.66; p = 0.06). For RSI, significant small increases from T1-to-T2 (∆9.9%, d = 0.5) were noted. Additionally, a significant main effect of time was found for snatch (d = 2.7) and clean-and-jerk (d = 3.1) with significant small-to-moderate increases for both tests from T1-to-T2 and T2-to-T3 (∆4.6–11.3%, d = 0.33 to 0.64). The other tests did not change significantly over time (0.1 ≤ d ≤ 0.8). Results showed significantly higher training volume for sport-specific training during the second period compared with the first period (d = 2.2). Five months of Olympic weightlifting contributed to significant changes in anthropometry, body-composition, and sport-specific performance. However, hardly any significant gains were observed for measures of physical fitness. Coaches are advised to design training programs that target a variety of fitness components to lay an appropriate foundation for later performance as an elite athlete. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 685 KW - strength KW - monitoring KW - young athletes KW - weight training KW - somatic variables KW - periodization KW - training load Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-472609 SN - 1866-8364 IS - 685 ER - TY - JOUR A1 - Chaabene, Helmi A1 - Negra, Yassine A1 - Moran, Jason A1 - Prieske, Olaf A1 - Sammoud, Senda A1 - Ramirez-Campillo, Rodrigo A1 - Granacher, Urs T1 - Plyometric training improves not only measures of linear speed, power, and change-of-direction speed but also repeated sprint ability in young female handball players JF - Journal of strength and conditioning research : the research journal of the NSCA N2 - This study examined the effects of an 8-week plyometric training (PT) program on components of physical fitness in young female handball players. Twenty-one female adolescent handball players were assigned to an experimental group (EG, n = 12; age = 15.9 +/- 0.2 years) or an active control group (CG, n = 9, age = 15.9 +/- 0.3 years). While EG performed plyometric exercises in replacement of some handball-specific drills, CG maintained the regular training schedule. Baseline and follow-up tests were performed for the assessment of linear speed (i.e., 5-, 10-, and 20-m time), change-of-direction (CoD) speed (i.e., T-test time), muscle power (i.e., countermovement jump [CMJ] height and reactive strength index [RSI]), and repeated sprint ability (RSA) (RSA total time [RSA(total)], RSA best time [RSA(best)], and RSA fatigue index [RSA(FI)]). Data were analyzed using magnitude-based inferences. Within-group analyses for the EG revealed moderate-to-large improvements for the 5-m (effect size [ES] = 0.81 [0.1-1.5]), 10-m sprint time (ES = 0.84 [0.1-1.5]), RSI (ES = 0.75 [0.1-1.4]), RSA(FI) (ES = 0.65 [0.0-1.3]), and T-test time (ES = 1.46 [0.7-2.2]). Trivial-to-small ES was observed for RSA(best) (ES = 0.18 [-0.5 to 0.9]), RSA(total) (ES = 0.45 [-0.2 to 1.1]), 20-m sprint time (ES = 0.56 [-0.1 to 1.2]), and CMJ height (ES = 0.57 [-0.1 to 1.3]). For the CG, within-group analyses showed a moderate performance decline for T-test time (ES = -0.71 [-1.5 to 0.1]), small decreases for 5-m sprint time (ES = -0.46 [-1.2 to 0.3]), and a trivial decline for 10-m (ES = -0.10 [-0.9 to 0.7]) and 20-m sprint times (ES = -0.16 [-0.9 to 0.6]), RSA(total) (ES = 0.0 [-0.8 to 0.8]), and RSA(best) (ES = -0.20 [-0.9 to 0.6]). The control group achieved trivial-to-small improvements for CMJ height (ES = 0.10 [-0.68 to 0.87]) and RSI (ES = 0.30 [-0.5 to 1.1]). In conclusion, a short-term in-season PT program, in replacement of handball-specific drills, is effective in improving measures of physical fitness (i.e., linear/CoD speed, jumping, and RSA) in young female handball players. KW - stretch-shortening cycle KW - physical fitness KW - young athletes Y1 - 2021 U6 - https://doi.org/10.1519/JSC.0000000000003128 SN - 1064-8011 SN - 1533-4287 VL - 35 IS - 8 SP - 2230 EP - 2235 PB - Lippincott Williams & Wilkins CY - Philadelphia ER -