51878
2018
2018
eng
70
75
6
66
article
Elsevier
Clare
1
2018-08-20
--
--
Is in-toing gait physiological in children?
Research question: This study aimed to establish reference values in 1-14 year old healthy children and to implement FPA-percentile curves for daily clinical use. Methods: 5910 healthy children performed at least 3 repetitions of barefoot walking over an instrumented walkway using a pressure measurement platform. The FPA [degrees] was extracted and analyzed by age and gender (mean +/- standard deviation; median with percentiles, MANOVA (age, gender) and Wilcoxon-Signed-Rank test for intra-individual side differences (alpha = 0.05). Results: FPA maximum was observed in 2-year-old children and diminished significant until the age of 4 to moderate out-toeing. For ages 5-14, no statistically significant differences in FPA values were present (p > 0.05). MANOVA confirmed age (p < 0.001) and gender (p < 0.001) as significant FPA influencing factors, without combined effect (p > 0.05). In every age group, right feet showed significantly greater out-toeing (p < 0.05). Significance: Percentile values indicate a wide FPA range in children. FPA development in young children shows a spontaneous shift towards moderate external rotation (age 2-4), whereby in-toeing <= 1-5 degrees can be present, but can return to normal. Bilateral in-toeing after the age of four and unilateral in-toeing after the age of seven should be monitored.
Gait & posture
Results of a large cohort study in 5910 healthy (pre-) school children
10.1016/j.gaitpost.2018.08.019
30170136
0966-6362
1879-2219
wos:2018
WOS:000445764700012
Verch, R (reprint author), Univ Outpatient Clin Potsdam, Dept Sports & Hlth Sci, Clin Exercise Sci, Neuen Palais 10 Haus 12, D-14471 Potsdam, Germany., verch@uni-potsdam.de
Federation of the German Footwear Industry (HDS, Offenbach, Germany); Ricosta Schuhfabriken GmbH (Donaueschingen, Germany); University of Potsdam (Potsdam, Germany)
2021-09-22T08:13:47+00:00
sword
importub
filename=package.tar
380aeaf79e317ca3cfa80231d026c89e
Verch, Ronald
false
true
Ronald Verch
Anja Hirschmüller
Juliane Müller
Heiner Baur
Frank Mayer
Steffen Müller
eng
uncontrolled
Foot progression angle
eng
uncontrolled
Children
eng
uncontrolled
In-toeing
eng
uncontrolled
Out-toeing
eng
uncontrolled
Gait
Medizin und Gesundheit
Department Sport- und Gesundheitswissenschaften
Import
43552
2008
2020
eng
4
624
postprint
1
2020-04-21
2020-04-21
--
Therapeutic efficiency and biomechanical effects of sport insoles in female runners
Postprints der Universität Potsdam : Humanwissenschaftliche Reihe
10.25932/publishup-43552
urn:nbn:de:kobv:517-opus4-435525
1866-8364
Journal of Foot and Ankle Research 1 (2008) O14 DOI: 10.1186/1757-1146-1-S1-O14
O14
Heiner Baur
Anja Hirschmüller
Michael Jahn
Steffen Müller
Frank Mayer
Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe
624
eng
uncontrolled
polyurethane foam
eng
uncontrolled
overuse injury
eng
uncontrolled
biomechanical effect
eng
uncontrolled
female runner
eng
uncontrolled
injury symptom
Medizin und Gesundheit
open_access
Referiert
Department Sport- und Gesundheitswissenschaften
Green Open-Access
Universität Potsdam
https://publishup.uni-potsdam.de/files/43552/phr624.pdf
36394
2012
2012
eng
53
57
5
1
33
article
Thieme
Stuttgart
1
--
--
--
Is EMG of the lower leg dependent on weekly running mileage?
Neuromuscular activity of the lower leg is dependent on the task performed, speed of movement and gender. Whether training volume influences neuromuscular activity is not known. The EMG of physically active persons differing in running mileage was analysed to investigate this. 55 volunteers were allocated to a low (LM: < 30 km), intermediate (IM: > 30 km & < 45 km) or high mileage (HM: > 45 km) group according to their weekly running volume. Neuromuscular activity of the lower leg was measured during running (3.33 m.s(-1)). Mean amplitude values for preactivation, weight acceptance and push-off were calculated and normalised to the mean activity of the entire gait cycle. Higher activity in the gastrocnemius group was observed in weight acceptance in LM compared to IM (+30%) and HM (+25%) but lower activity was present in the push-off for LM compared to IM and HM. For the peroneal muscle, differences were present in the push-off where HM showed increased activity compared to IM (+24%) and LM (+60%). The tibial muscle revealed slightly lower activity during preactivation for the high mileage runners. Neuromuscular activity differs during stance between the high and intermediate group compared to low mileage runners. Slight adaptations in neuromuscular activation indicate a more target-oriented activation strategy possibly due to repetitive training in runners with higher weekly mileage.
International journal of sports medicine
10.1055/s-0031-1286250
0172-4622
wos:2011-2013
WOS:000298397800010
Baur, H (reprint author), Bern Univ Appl Sci, Murtenstr 10, CH-3008 Bern, Switzerland., heiner.baur@bfh.ch
Federal Institute for Sport Science (BISP), Bonn, Germany; Duncan
Cummins, Solden, Germany; [VF 0407/01/18/2001-2002]; [VF
0407/01/49/2003-2005]
Heiner Baur
Anja Hirschmüller
Steffen Müller
Michael Cassel
Frank Mayer
eng
uncontrolled
locomotion
eng
uncontrolled
neuromuscular control
eng
uncontrolled
running gait
eng
uncontrolled
training volume
Referiert
Department Sport- und Gesundheitswissenschaften
Institut für Sportmedizin und Prävention
32064
2010
2010
eng
article
1
--
--
--
Gender-specific neuromuscular activity of the M. peroneus longus in healthy runners : a descriptive laboratory study
Background: Gender-specific neuromuscular activity for the ankle (e.g., peroneal muscle) is currently not known. This knowledge may contribute to the understanding of overuse injury mechanisms. The purpose was therefore to analyse the neuromuscular activity of the peroneal muscle in healthy runners. Methods: Fifty-three male and 54 female competitive runners were tested on a treadmill at 3.33 m s(-1). Neuromuscular activity of the M. peroneus longus was measured by electromyography and analysed in the time domain (onset of activation, time of maximum of activation, total time of activation) in % of stride time in relation to touchdown (= 1.0). Additionally, mean amplitudes for the gait cycle phases preactivation, weight acceptance and push-off were calculated and normalised to the mean activity of the entire gait cycle. Findings: Onset of activation (mean; female: 0.86/male: 0.90, p<0.0001) and time of maximum of activation (female: 1.13/male: 1.16, p<0.0001) occurred earlier in female compared to male and the total time of activation was longer in women (female: 0.42/male: 0.39, p=0.0036). In preactivation, women showed higher amplitudes (+ 21%) compared to men (female: 1.16/male: 0.92, p<0.0001). Activity during weight acceptance (female: 2.26/male: 2.41, p = 0.0039) and push-off (female: 0.93/male: 1.07, p = 0.0027) were higher in men. Interpretation: Activation strategies of the peroneal muscle appear to be gender-specific. Higher preactivation amplitudes in females indicate a different neuromuscular control in anticipation of touchdown ("pre-programmed activity"). These data may help interpret epidemiologically reported differences between genders in overuse injury frequency and localisation.
http://www.sciencedirect.com/science/journal/02680033
10.1016/j.clinbiomech.2010.06.009
0268-0033
allegro:1991-2014
10108418
Clinical biomechanics. - ISSN 0268-0033. - 25 (2010), 9, S. 938 - 943
Heiner Baur
Anja Hirschmüller
Michael Cassel
Steffen Müller
Frank Mayer
Referiert
Department Sport- und Gesundheitswissenschaften
36826
2011
2011
eng
499
505
7
3
21
article
Elsevier
Oxford
1
--
--
--
Comparison in lower leg neuromuscular activity between runners with unilateral mid-portion Achilles tendinopathy and healthy individuals
Neuromuscular control in functional situations and possible impairments due to Achilles tendinopathy are not well understood.
Thirty controls (CO) and 30 runners with Achilles tendinopathy (AT) were tested on a treadmill at 3.33 m s(-1) (12 km h(-1)). Neuromuscular activity of the lower leg (tibialis anterior, peroneal, and gastrocnemius muscle) was measured by surface electromyography. Mean amplitude values (MAV) for the gait cycle phases preactivation, weight acceptance and push-off were calculated and normalised to the mean activity of the entire gait cycle.
MAVs of the tibialis anterior did not differ between CO and AT in any gait cycle phase. The activation of the peroneal muscle was lower in AT in weight acceptance (p = 0.006), whereas no difference between CO and AT was found in preactivation (p = 0.71) and push-off (p = 0.83). Also, MAVs of the gastrocnemius muscle did not differ between AT and CO in preactivity (p = 0.71) but were reduced in AT during weight acceptance (p = 0.001) and push-off (p = 0.04).
Achilles tendinopathy does not seem to alter pre-programmed neural control but might induce mechanical deficits of the lower extremity during weight bearing (joint stability). This should be addressed in the therapy process of AT.
Journal of electromyography and kinesiology
10.1016/j.jelekin.2010.11.010
1050-6411
wos:2011-2013
WOS:000290707900015
Baur, H (reprint author), Univ Potsdam, Univ Outpatient Clin, Am Neuen Palais 10 Haus 12, D-14469 Potsdam, Germany., hbaur@uni-potsdam.de
Federal Institute for Sport Science (BISP), Bonn, Germany [VF
0407/01/18/2001-2002, VF 0407/01/49/2003-2005]
Heiner Baur
Steffen Müller
Anja Hirschmüller
Michael Cassel
Josefine Weber
Frank Mayer
eng
uncontrolled
Ankle joint
eng
uncontrolled
Electromyography
eng
uncontrolled
Overuse injury
eng
uncontrolled
Running gait
Referiert
Department Sport- und Gesundheitswissenschaften
Institut für Sportwissenschaft
36725
2011
2011
eng
1500
1506
7
8
43
article
Lippincott Williams & Wilkins
Philadelphia
1
--
--
--
Neuromuscular activity of the peroneal muscle after foot orthoses therapy in runners
BAUR, H., A. HIRSCHMULLER, S. MULLER, and F. MAYER. Neuromuscular Activity of the Peroneal Muscle after Foot Orthoses Therapy in Runners. Med. Sci. Sports Exerc., Vol. 43, No. 8, pp. 1500-1506, 2011. Purpose: Foot orthoses are a standard option to treat overuse injury. Biomechanical data providing mechanisms of foot orthoses' effectiveness are sparse. Stability of the ankle joint complex might be a key factor. The purpose was therefore to analyze neuromuscular activity of the musculus peroneus longus in runners with overuse injury symptoms treated with foot orthoses. Methods: A total of 99 male and female runners with overuse injury symptoms randomized in a control group (CO) and an orthoses group (OR) were analyzed on a treadmill at 3.3 m.s(-1) before and after an 8-wk foot orthoses intervention. Muscular activity of the musculus peroneus longus was measured and quantified in the time domain (initial onset of activation (T-ini), time of maximal activity (T-max), total time of activation (T-tot)) and amplitude domain (amplitude in preactivation (A(pre)), weight acceptance (A(wa)), push-off (A(po))). Results: Peroneal activity in the time domain did not differ initially between CO and OR, and no effect was observed after therapy (T-ini: CO = -0.88 +/- 0.09, OR = -0.88 +/- 0.08 / T-max: CO = 0.14 +/- 0.06, OR = 0.15 +/- 0.06 / T-tot: CO = 0.40 +/- 0.09, OR = 0.41 +/- 0.09; P > 0.05). In preactivation (Apre), muscle activity was higher in OR after intervention (CO = 0.97 +/- 0.32, 95% confidence interval = 0.90-1.05; OR = 1.18 +/- 0.43, 95% confidence interval = 1.08-1.28; P = 0.003). There was no group or intervention effect during stance (A(wa): CO = 2.33 +/- 0.66, OR = 2.33 +/- 0.74 / A(po): CO = 0.80 +/- 0.41, OR = 0.88 +/- 0.40; P > 0.05). Conclusions: Enhanced muscle activation of the musculus peroneus longus in preactivation suggests an altered preprogrammed activity, which might lead to better ankle stability providing a possible mode of action for foot orthoses therapy.
Medicine and science in sports and exercise : official journal of the American College of Sports Medicine
10.1249/MSS.0b013e31820c64ae
0195-9131
wos:2011-2013
WOS:000292773000015
Baur, H (reprint author), Univ Potsdam, Univ Outpatient Clin, Neuen Palais 10,Haus 12, D-14469 Potsdam, Germany., heiner.baur@uni-potsdam.de
Federal Institute for Sport Science (BISP), Bonn, Germany [VF
0407/01/18/2001-2002, VF 0407/01/49/2003-2005]
Heiner Baur
Anja Hirschmüller
Steffen Müller
Frank Mayer
eng
uncontrolled
ANKLE JOINT
eng
uncontrolled
EMG
eng
uncontrolled
INSERT
eng
uncontrolled
INSOLE
eng
uncontrolled
JOINT STABILITY
eng
uncontrolled
OVERUSE INJURY
Referiert
Department Sport- und Gesundheitswissenschaften
Institut für Sportmedizin und Prävention
36641
2011
2011
eng
959
965
7
12
45
article
BMJ Publ. Group
London
1
--
--
--
Clinical effectiveness of customised sport shoe orthoses for overuse injuries in runners a randomised controlled study
Background and objectives Treatment of chronic running-related overuse injuries by orthopaedic shoe orthoses is very common but not evidence-based to date.
Hypothesis Polyurethane foam orthoses adapted to a participant's barefoot plantar pressure distribution are an effective treatment option for chronic overuse injuries in runners.
Design Prospective, randomised, controlled clinical trial.
Intervention 51 patients with running injuries were treated with custom-made, semirigid running shoe orthoses for 8 weeks. 48 served as a randomised control group that continued regular training activity without any treatment.
Main outcome measures Evaluation was made by the validated pain questionnaire Subjective Pain Experience Scale, the pain disability index and a comfort index in the orthoses group (ICI).
Results There were statistically significant differences between the orthoses and control groups at 8 weeks for the pain disability index (mean difference 3.2; 95% CI 0.9 to 5.5) and the Subjective Pain Experience Scale (6.6; 2.6 to 10.6). The patients with orthoses reported a rising wearing comfort (pre-treatment ICI 69/100; post-treatment ICI 83/100) that was most pronounced in the first 4 weeks (ICI 80.4/100).
Conclusion Customised polyurethane running shoe orthoses are an effective conservative therapy strategy for chronic running injuries with high comfort and acceptance of injured runners.
British journal of sports medicine : the journal of sport and exercise medicine
10.1136/bjsm.2008.055830
0306-3674
wos:2011-2013
WOS:000294614600009
Hirschmuller, A (reprint author), Univ Hosp Freiburg, Dept Orthopaed & Traumatol, Hugstetter Str 55, D-79106 Freiburg, Germany., anja.hirschmueller@uniklinik-freiburg.de
National Institute of Sports Science (BISP), Bonn, Germany
Anja Hirschmüller
Heiner Baur
Steffen Müller
Peter Helwig
Hans-Hermann Dickhuth
Frank Mayer
Referiert
Department Sport- und Gesundheitswissenschaften
Institut für Sportmedizin und Prävention
36596
2011
2011
eng
1135
1143
9
10
42
article
Elsevier
Oxford
1
--
--
--
Do changes in dynamic plantar pressure distribution, strength capacity and postural control after intra-articular calcaneal fracture correlate with clinical and radiological outcome?
Fractures of the calcaneus are often associated with serious permanent disability, a considerable reduction in quality of life, and high socio-economic cost. Although some studies have already reported changes in plantar pressure distribution after calcaneal fracture, no investigation has yet focused on the patient's strength and postural control.
Method: 60 patients with unilateral, operatively treated, intra-articular calcaneal fractures were clinically and biomechanically evaluated >1 year postoperatively (physical examination, SF-36, AOFAS score, lower leg isokinetic strength, postural control and gait analysis including plantar pressure distribution). Results were correlated to clinical outcome and preoperative radiological findings (Bohler angle, Zwipp and Sanders Score).
Results: Clinical examination revealed a statistically significant reduction in range of motion at the tibiotalar and the subtalar joint on the affected side. Additionally, there was a statistically significant reduction of plantar flexor peak torque of the injured compared to the uninjured limb (p < 0.001) as well as a reduction in postural control that was also more pronounced on the initially injured side (standing duration 4.2 +/- 2.9 s vs. 7.6 +/- 2.1 s, p < 0.05). Plantar pressure measurements revealed a statistically significant pressure reduction at the hindfoot (p = 0.0007) and a pressure increase at the midfoot (p = 0.0001) and beneath the lateral forefoot (p = 0.037) of the injured foot.
There was only a weak correlation between radiological classifications and clinical outcome but a moderate correlation between strength differences and the clinical questionnaires (CC 0.27-0.4) as well as between standing duration and the clinical questionnaires. Although thigh circumference was also reduced on the injured side, there was no important relationship between changes in lower leg circumference and strength suggesting that measurement of leg circumference may not be a valid assessment of maximum strength deficits. Self-selected walking speed was the parameter that showed the best correlation with clinical outcome (AOFAS score).
Conclusion: Calcaneal fractures are associated with a significant reduction in ankle joint ROM, plantar flexion strength and postural control. These impairments seem to be highly relevant to the patients. Restoration of muscular strength and proprioception should therefore be aggressively addressed in the rehabilitation process after these fractures.
Injury : international journal of the care of the injured
10.1016/j.injury.2010.09.040
0020-1383
wos:2011-2013
WOS:000294539800031
Hirschmuller, A (reprint author), Univ Hosp Freiburg, Dept Orthopaed & Traumatol, Hugstetter Str 55, D-79106 Freiburg, Germany., anja.hirschmueller@uniklinik-freiburg.de
German Section of the AO Foundation (International Association for the Study of Internal Fixation)
Anja Hirschmüller
Lukas Konstantinidis
Heiner Baur
Steffen Müller
Alexander Mehlhorn
Julia Kontermann
Ulrich Grosse
Norbert P. Südkamp
Peter Helwig
eng
uncontrolled
Intra-articular calcaneal fracture
eng
uncontrolled
Calcaneus
eng
uncontrolled
Muscle strength
eng
uncontrolled
Peak torque
eng
uncontrolled
Plantar pressure distribution
eng
uncontrolled
Proprioception
eng
uncontrolled
Postural control
eng
uncontrolled
Balance
eng
uncontrolled
Gait
eng
uncontrolled
Rehabilitation
Referiert
Department Sport- und Gesundheitswissenschaften
Institut für Sportmedizin und Prävention
46831
2006
2006
eng
906
910
5
40
article
BMJ Publ. Group
London
1
--
2006-09-01
--
Reactivity, stability, and strength performance capacity in motor sports
Background: Racing drivers require multifaceted cognitive and physical abilities in a multitasking situation. A knowledge of their physical capacities may help to improve fitness and performance. Objective: To compare reaction time, stability performance capacity, and strength performance capacity of elite racing drivers with those of age-matched, physically active controls. Methods: Eight elite racing drivers and 10 physically active controls matched for age and weight were tested in a reaction and determination test requiring upper and lower extremity responses to visual and audio cues. Further tests comprised evaluation of one-leg postural stability on a two-dimensional moveable platform, measures of maximum strength performance capacity of the extensors of the leg on a leg press, and a test of force capacity of the arms in a sitting position at a steering wheel. An additional arm endurance test consisted of isometric work at the steering wheel at + 30 degrees and -30 degrees where an eccentric threshold load of 30 N.m was applied. Subjects had to hold the end positions above this threshold until exhaustion. Univariate one way analysis of variance (alpha = 0.05) including a Bonferroni adjustment was used to detect group differences between the drivers and controls. Results: The reaction time of the racing drivers was significantly faster than the controls ( p = 0.004). The following motor reaction time and reaction times in the multiple determination test did not differ between the groups. No significant differences (p> 0.05) were found for postural stability, leg extensor strength, or arm strength and endurance. Conclusions: Racing drivers have faster reaction times than age-matched physically active controls. Further development of motor sport-specific test protocols is suggested. According to the requirements of motor racing, strength and sensorimotor performance capacity can potentially be improved.
British journal of sports medicine : the journal of sport and exercise medicine
10.1136/bjsm.2006.025783
16950885
0306-3674
wos:2006
WOS:000241494700005
Baur, H (reprint author), Univ Potsdam, Inst Sports Med & Prevent, Potsdam, Germany., heiner@heinerbaur.de
importub
2020-05-03T16:59:28+00:00
filename=package.tar
148165c9e529dad8e1492a22427377bb
false
true
Heiner Baur
Steffen Müller
Anja Hirschmüller
Georg Huber
Frank Mayer
Sozialwissenschaften
Department Sport- und Gesundheitswissenschaften
Import
Institut für Sportwissenschaft