Refine
Year of publication
Document Type
- Article (189)
- Postprint (91)
- Review (15)
- Other (9)
- Monograph/Edited Volume (1)
- Conference Proceeding (1)
Is part of the Bibliography
- yes (306) (remove)
Keywords
- football (26)
- resistance training (19)
- adolescents (18)
- athletic performance (14)
- exercise (14)
- youth (14)
- balance (13)
- training (12)
- performance (11)
- strength training (11)
- stretch-shortening cycle (11)
- children (10)
- monitoring (10)
- muscle strength (10)
- training load (10)
- postural control (9)
- Exercise (8)
- Gait (8)
- electromyography (8)
- elite athletes (8)
- gait (8)
- injury risk (8)
- power (8)
- strength (8)
- young athletes (8)
- plyometric training (7)
- Stretch-shortening cycle (6)
- aging (6)
- muscle power (6)
- physical fitness (6)
- physiology (6)
- postural stability (6)
- Electromyography (5)
- Ground reaction force (5)
- Resistance training (5)
- force (5)
- injury (5)
- jumping (5)
- movement (5)
- periodization (5)
- plyometric exercise (5)
- recovery (5)
- sport-specific performance (5)
- striking combat sports (5)
- working memory (5)
- youth sports (5)
- Aging (4)
- Balance (4)
- EMG (4)
- Performance (4)
- Team sports (4)
- Youth (4)
- agility (4)
- change of direction (4)
- elderly (4)
- global positioning system (4)
- ground reaction force (4)
- human physical conditioning (4)
- inertial measurement unit (4)
- loading rate (4)
- muscle (4)
- physical performance (4)
- postural sway (4)
- rate of perceived exertion (4)
- rolling averages (4)
- running (4)
- sensitivity (4)
- soccer (4)
- speed (4)
- validity (4)
- weighted moving averages (4)
- Body composition (3)
- COVID-19 (3)
- DXA (3)
- EEG (3)
- Fatigue (3)
- Physical fitness (3)
- Postural stability (3)
- Power (3)
- RPE (3)
- Seniors (3)
- Trunk muscle strength (3)
- Walking (3)
- adolescent (3)
- apoptosis (3)
- attentional demand (3)
- biomechanics (3)
- cardiomyopathy (3)
- cardiorespiratory fitness (3)
- child (3)
- cognitive performance (3)
- cognitive-postural dual task (3)
- diabetes (3)
- fatigue (3)
- gait analysis (3)
- ground reaction forces (3)
- high-intensity-interval training (3)
- hospitalization (3)
- matched time (3)
- maturation (3)
- maturity (3)
- miRNAs (3)
- modality compatibility (3)
- motor skills (3)
- musculoskeletal and neural physiological phenomena (3)
- oarsmen (3)
- on-water performance (3)
- overreaching (3)
- overtraining (3)
- peak height velocity (3)
- physical conditioning human (3)
- plyometrics (3)
- range of motion (3)
- rate of torque development (3)
- reliability (3)
- running mechanics (3)
- somatic variables (3)
- talent (3)
- weight loss (3)
- youth athletes (3)
- youth soccer (3)
- ACWR (2)
- Acceleration (2)
- Acute Recovery and Stress Scale (ARSS) (2)
- Children (2)
- Cognitive fatigue (2)
- Cognitive interference (2)
- Cognitive/motor interference (2)
- Computer Software (2)
- Conditioning activity (2)
- Countermovement jump (2)
- Crossover (2)
- Daily life (2)
- Detraining (2)
- EMOTIKON (2)
- Exertion (2)
- Flat feet (2)
- Football (2)
- Footwear (2)
- Ginkgo biloba extract (2)
- Healthy aging (2)
- Injury risk (2)
- Jugendliche (2)
- Jump height (2)
- Kampfsport (2)
- Kinder (2)
- Kinematics (2)
- Linear regression analysis (2)
- Maximalkraft (2)
- Mobility (2)
- Motion (2)
- Muscle (2)
- Muscle mass (2)
- Muscle power (2)
- Muscle strength (2)
- OptoGait (2)
- Overhead athletes (2)
- Postural control (2)
- Principal component analysis (2)
- Proactive/reactive balance (2)
- RGB-D cameras (2)
- Recovery (2)
- Repeated sprint (2)
- Scanning electron microscopy (2)
- Schnellkraft (2)
- Short‐term effect (2)
- Shoulder (2)
- Single/dual tasking (2)
- Speed (2)
- Sport-specific performance (2)
- Steady-state balance (2)
- Stress levels (2)
- Sway (2)
- Swimming performance (2)
- Tiredness (2)
- Velocity (2)
- Widerstandstraining (2)
- Young swimmers (2)
- Zebris (2)
- academy (2)
- acute chronic workload ratio (2)
- aerobic exercise (2)
- aerobic metabolism (2)
- aerobic power (2)
- allometry (2)
- alpha-2 (2)
- ankles (2)
- anterior cruciate ligament (2)
- anthropometry (2)
- anxiety (2)
- balance training (2)
- barbell velocity (2)
- biological age (2)
- biological maturation (2)
- blood (2)
- blood sample (2)
- body density (2)
- body limbs (2)
- body shape (2)
- calcaneal eversion (2)
- canoe racing (2)
- change of direction speed (2)
- change-of-direction speed (2)
- cognitive interference (2)
- cognitive/muscular fatigue (2)
- combat sport (2)
- comparison of devices (2)
- concurrent training (2)
- conditioning activity (2)
- conditioning exercise (2)
- core strength (2)
- cross-education (2)
- data pipeline (2)
- depression (2)
- diabetes mellitus (2)
- diabetic (2)
- digital health (2)
- drop jump (2)
- dual task (2)
- dual-task costs (2)
- early sport specialization (2)
- eccentric-plyometric (2)
- endurance performance (2)
- evaluation (2)
- exercise intervention (2)
- exercise test (2)
- exercise training (2)
- external load (2)
- external training load (2)
- eyedness (2)
- fMRI (2)
- feet (2)
- fitness tests (2)
- flat feet (2)
- footedness (2)
- force production (2)
- functional performance (2)
- gait analysis algorithm (2)
- gait speed (2)
- gender differences (2)
- hamstring muscles (2)
- heart rate (2)
- hematocrit (2)
- hip (2)
- hormones (2)
- human motion (2)
- immune system (2)
- internal load (2)
- jump performance (2)
- jump training (2)
- jumps (2)
- kinetics (2)
- knee joint angle (2)
- knee osteoarthritis (2)
- knees (2)
- late childhood (2)
- latency (2)
- laterality (2)
- limb overuse conditions (2)
- linear sprint (2)
- long-term (2)
- low-back-pain (2)
- lower limb mechanics (2)
- lower-extremity kinematics (2)
- martial arts (2)
- material fatigue (2)
- medial longitudinal arch (2)
- mental imagery (2)
- meta-analysis (2)
- methodological quality (2)
- mitochondrial adaptation (2)
- mobility disability (2)
- motion capture (2)
- motor-performance (2)
- muscle activation (2)
- muscle fitness (2)
- muscle metabolism (2)
- muscular endurance (2)
- muscular strength (2)
- of-direction speed (2)
- oxygen consumption (2)
- passive stretching (2)
- peak torque (2)
- pelvic alignment (2)
- pervasive healthcare (2)
- physical fitness expertise (2)
- physiological strain (2)
- postural balance (2)
- power training (2)
- prevention (2)
- public dataset (2)
- race time (2)
- randomized controlled-trial (2)
- responses (2)
- return-to-sport (2)
- rotation (2)
- rugby league players (2)
- schedule (2)
- scholastic demands (2)
- school baseball players (2)
- sensorimotor training (2)
- sex-differences (2)
- skeletal joints (2)
- specific assessment (2)
- specificity (2)
- sportliche Leistung (2)
- sports (2)
- sprint (2)
- sprinting (2)
- sprints (2)
- stability (2)
- standing position (2)
- taekwondo electronic scoring system (2)
- taekwondo-specific testing (2)
- tasks (2)
- team sport (2)
- theta (2)
- time-efficient exercise (2)
- track and field (2)
- training adaptation (2)
- twitch torque (2)
- unstable walkway (2)
- virus infection (2)
- water sports (2)
- weight lifting (2)
- weight training (2)
- weightlifting (2)
- whole-body vibratoin (2)
- women (2)
- work-rate distribution (2)
- young soccer players (2)
- youth sport (2)
- Accelerometer (1)
- Alpha-2 (1)
- Association (1)
- Athlete testing (1)
- Attention (1)
- Balance Tests (1)
- Biomechanics (1)
- Bow leg (1)
- Cardiorespiratory endurance (1)
- Central activation (1)
- Cognition motor (1)
- Cognitive enhancer (1)
- Cognitive skills (1)
- Cohort study (1)
- Core stability (1)
- Core strength (1)
- Cross-over fatigue (1)
- Crossover fatigue (1)
- Developmental gains (1)
- Dual tasks (1)
- EXERCISE (1)
- Elderly (1)
- Electric stimulation (1)
- Electroencephalography (EEG) (1)
- Electromyography (EMG) (1)
- Elite sports (1)
- Endocrine (1)
- Endurance (1)
- Executive function (1)
- Exercise therapy (1)
- Exhaustion (1)
- Explosive force production (1)
- Fall risk (1)
- Fall risk assessment (1)
- Falls (1)
- Field test (1)
- Flexibility (1)
- Force (1)
- Force production (1)
- Frail elderly (1)
- Free moment (1)
- Functional magnetic resonance imaging (fMRI) (1)
- Gait biomechanics (1)
- Gait kinematics (1)
- Gait kinetics (1)
- Gym-based/home-based training (1)
- Health care (1)
- ICA (1)
- Instability (1)
- Intensity Dose -response relationship (1)
- Isokinetic (1)
- Judo-specific pulling movement (1)
- Jumping height (1)
- Keyage children (1)
- Kindergarten (1)
- Knee valgus (1)
- Knee valgus motion (1)
- Lateral jumps (1)
- Linear Mixed Models (1)
- Linear mixed models (1)
- Loading rate (1)
- Lower-extremity muscle power (1)
- MUSCLE (1)
- Maturation (1)
- Maximal isometric force (1)
- Maximal voluntary contraction (MVC) (1)
- Mental fatigue (1)
- Metabolism (1)
- Mild cognitive impairment (1)
- Morote-seoi-nage (1)
- Motor function (1)
- Motor performance (1)
- Motor skills (1)
- Movement velocity (1)
- Multiple sclerosis (1)
- Muscle contraction (1)
- Muscle torque (1)
- Neural inhibition (1)
- Oberflächenelektromyografie (1)
- Older-than-keyage children (1)
- Optojump system (1)
- Paediatrics (1)
- Parkinson's disease (1)
- Pediatric gait (1)
- Performance gains (1)
- Physical Fitness (1)
- Physical performance (1)
- Physiology (1)
- Plyometric exercise (1)
- Plyometrics (1)
- Post-activation potentiation (1)
- Postactivation potentiation (1)
- Postural Control (1)
- Postural balance (1)
- Power training (1)
- Preventive therapy (1)
- Primary school (1)
- Primary school children (1)
- Quadriceps muscle (1)
- Quadriceps strength (1)
- Quarantine (1)
- Reactive movement (1)
- Reflex (1)
- Sars-CoV-2 (1)
- Sensorimotor training (1)
- Skill (1)
- Squat jump (1)
- Strength training (1)
- Stress (1)
- Theraband training (1)
- Theta (1)
- Transcranial magnetic brain stimulation (TMS) (1)
- Vertec device (1)
- WALKING (1)
- Walking speed (1)
- Work ability (1)
- activities (1)
- adolescent athletes (1)
- age (1)
- annual training (1)
- assessment (1)
- athlete testing (1)
- athlete. (1)
- athletes (1)
- athletic (1)
- attention (1)
- balance strategy (1)
- ball speed (1)
- ballistic training (1)
- blood lactate (1)
- blood lactate; (1)
- bone (1)
- boys (1)
- causal mediation analysis (1)
- climbing (1)
- cognitive enhancer (1)
- cognitive function (1)
- cognitive skills (1)
- cognitive/motor interference (1)
- combat sports (1)
- conditioning stimulus (1)
- congested calendar (1)
- core (1)
- deconditioning (1)
- detraining (1)
- directed acyclic graphs (1)
- dominant limb (1)
- dose response (1)
- dose-response relation (1)
- dose-response relationship (1)
- electroencephalography (1)
- elite (1)
- elite sport (1)
- endocrine (1)
- endurance (1)
- energetic systems (1)
- executive function (1)
- exercise prescription (1)
- exhaustion (1)
- explosive force production (1)
- fall risk assessment (1)
- field test (1)
- fitness (1)
- flat foot (1)
- flexibility (1)
- footwear (1)
- free moment (1)
- function (1)
- fundamental movement skill (1)
- gender (1)
- girls (1)
- hearing loss (1)
- high effect size (1)
- high-intensity interval training (1)
- impact loading (1)
- infection (1)
- injury prevention (1)
- instability resistance training (1)
- intermittent sport (1)
- intervention (1)
- jump (1)
- jump height (1)
- jump height/power (1)
- jump performances (1)
- jump/sprint exercises (1)
- jumping ability (1)
- kindergarten (1)
- knee (1)
- knee flexion angle (1)
- knee valgus angle (1)
- knee valgus motion (1)
- leg extensors (1)
- load carriage (1)
- load-velocity (1)
- load–velocity relationship (1)
- locomotor skill (1)
- maximal isometric contraction (1)
- maximal isometric torque (1)
- maximum voluntary contraction (1)
- metabolism (1)
- mild cognitive impairment (1)
- motivational climate (1)
- motor performance (1)
- motor skill (1)
- muscle activity (1)
- muscle coactivation (1)
- muscular power (1)
- musculature (1)
- myofascial (1)
- neuromuscular rolling (1)
- non-dominant limb (1)
- of daily living (1)
- optimal load (1)
- patients (1)
- performance gains (1)
- physical activity (1)
- physical activity program (1)
- physical fitness test (1)
- post-activation potentiation (1)
- preactivation (1)
- pressure (1)
- primary school (1)
- proactive/reactive balance (1)
- progression (1)
- proprioception (1)
- race (1)
- rate of force development (1)
- rating of perceived exertion (1)
- reactive movement (1)
- reflex (1)
- region/point elastic gym floor (1)
- relationship (1)
- relationships (1)
- resistance (1)
- running velocity (1)
- sedentary (1)
- self massage (1)
- self-massage therapy (1)
- self-myofascial release (1)
- seniors (1)
- sensory input (1)
- shoe (1)
- short latency response (1)
- shoulder girdle (1)
- shoulder strength (1)
- single/dual tasking (1)
- ski jumping (1)
- skill (1)
- soccer players (1)
- specific strength training (1)
- spezifisches Krafttraining (1)
- sport profile (1)
- static/dynamic postural control (1)
- steady-state balance (1)
- stroke (1)
- structured (1)
- surface electromyography (1)
- task difficulty (1)
- tendon stiffness (1)
- test-retest reliability (1)
- therapy (1)
- time (1)
- torque (1)
- training intensity (1)
- training intervention (1)
- training specificity (1)
- vertical jump height (1)
- vestibular (1)
- virus (1)
- walking (1)
- walking capacity (1)
- walking speed (1)
- work (1)
- young (1)
- young adults (1)
Institute
- Department Sport- und Gesundheitswissenschaften (139)
- Strukturbereich Kognitionswissenschaften (105)
- Humanwissenschaftliche Fakultät (22)
- Extern (16)
- Department Psychologie (9)
- Hasso-Plattner-Institut für Digital Engineering GmbH (6)
- Fakultät für Gesundheitswissenschaften (3)
- Mathematisch-Naturwissenschaftliche Fakultät (3)
- Fachgruppe Soziologie (1)
Age-related decline in executive functions and postural control due to degenerative processes in the central nervous system have been related to increased fall-risk in old age. Many studies have shown cognitive-postural dual-task interference in old adults, but research on the role of specific executive functions in this context has just begun. In this study, we addressed the question whether postural control is impaired depending on the coordination of concurrent response-selection processes related to the compatibility of input and output modality mappings as compared to impairments related to working-memory load in the comparison of cognitive dual and single tasks. Specifically, we measured total center of pressure (CoP) displacements in healthy female participants aged 19–30 and 66–84 years while they performed different versions of a spatial one-back working memory task during semi-tandem stance on an unstable surface (i.e., balance pad) while standing on a force plate. The specific working-memory tasks comprised: (i) modality compatible single tasks (i.e., visual-manual or auditory-vocal tasks), (ii) modality compatible dual tasks (i.e., visual-manual and auditory-vocal tasks), (iii) modality incompatible single tasks (i.e., visual-vocal or auditory-manual tasks), and (iv) modality incompatible dual tasks (i.e., visual-vocal and auditory-manual tasks). In addition, participants performed the same tasks while sitting. As expected from previous research, old adults showed generally impaired performance under high working-memory load (i.e., dual vs. single one-back task). In addition, modality compatibility affected one-back performance in dual-task but not in single-task conditions with strikingly pronounced impairments in old adults. Notably, the modality incompatible dual task also resulted in a selective increase in total CoP displacements compared to the modality compatible dual task in the old but not in the young participants. These results suggest that in addition to effects of working-memory load, processes related to simultaneously overcoming special linkages between input- and output modalities interfere with postural control in old but not in young female adults. Our preliminary data provide further evidence for the involvement of cognitive control processes in postural tasks.
There is evidence for cortical contribution to the regulation of human postural control. Interference from concurrently performed cognitive tasks supports this notion, and the lateral prefrontal cortex (lPFC) has been suggested to play a prominent role in the processing of purely cognitive as well as cognitive-postural dual tasks. The degree of cognitive-motor interference varies greatly between individuals, but it is unresolved whether individual differences in the recruitment of specific lPFC regions during cognitive dual tasking are associated with individual differences in cognitive-motor interference. Here, we investigated inter-individual variability in a cognitive-postural multitasking situation in healthy young adults (n = 29) in order to relate these to inter-individual variability in lPFC recruitment during cognitive multitasking. For this purpose, a oneback working memory task was performed either as single task or as dual task in order to vary cognitive load. Participants performed these cognitive single and dual tasks either during upright stance on a balance pad that was placed on top of a force plate or during fMRI measurement with little to no postural demands. We hypothesized dual one-back task performance to be associated with lPFC recruitment when compared to single one-back task performance. In addition, we expected individual variability in lPFC recruitment to be associated with postural performance costs during concurrent dual one-back performance. As expected, behavioral performance costs in postural sway during dual-one back performance largely varied between individuals and so did lPFC recruitment during dual one-back performance. Most importantly, individuals who recruited the right mid-lPFC to a larger degree during dual one-back performance also showed greater postural sway as measured by larger performance costs in total center of pressure displacements. This effect was selective to the high-load dual one-back task and suggests a crucial role of the right lPFC in allocating resources during cognitivemotor interference. Our study provides further insight into the mechanisms underlying cognitive-motor multitasking and its impairments.
Age-related decline in executive functions and postural control due to degenerative processes in the central nervous system have been related to increased fall-risk in old age. Many studies have shown cognitive-postural dual-task interference in old adults, but research on the role of specific executive functions in this context has just begun. In this study, we addressed the question whether postural control is impaired depending on the coordination of concurrent response-selection processes related to the compatibility of input and output modality mappings as compared to impairments related to working-memory load in the comparison of cognitive dual and single tasks. Specifically, we measured total center of pressure (CoP) displacements in healthy female participants aged 19-30 and 66-84 years while they performed different versions of a spatial one-back working memory task during semi-tandem stance on an unstable surface (i.e., balance pad) while standing on a force plate. The specific working-memory tasks comprised: (i) modality compatible single tasks (i.e., visual-manual or auditory-vocal tasks), (ii) modality compatible dual tasks (i.e., visual-manual and auditory-vocal tasks), (iii) modality incompatible single tasks (i.e., visual-vocal or auditory-manual tasks), and (iv) modality incompatible dual tasks (i.e., visual-vocal and auditory-manual tasks). In addition, participants performed the same tasks while sitting. As expected from previous research, old adults showed generally impaired performance under high working-memory load (i.e., dual vs. single one-back task). In addition, modality compatibility affected one-back performance in dual-task but not in single-task conditions with strikingly pronounced impairments in old adults. Notably, the modality incompatible dual task also resulted in a selective increase in total CoP displacements compared to the modality compatible dual task in the old but not in the young participants. These results suggest that in addition to effects of working-memory load, processes related to simultaneously overcoming special linkages between input-and output modalities interfere with postural control in old but not in young female adults. Our preliminary data provide further evidence for the involvement of cognitive control processes in postural tasks.
Cognitive resources contribute to balance control. There is evidence that mental fatigue reduces cognitive resources and impairs balance performance, particularly in older adults and when balance tasks are complex, for example when trying to walk or stand while concurrently performing a secondary cognitive task.
We conducted a systematic literature search in PubMed (MEDLINE), Web of Science and Google Scholar to identify eligible studies and performed a random effects meta-analysis to quantify the effects of experimentally induced mental fatigue on balance performance in healthy adults. Subgroup analyses were computed for age (healthy young vs. healthy older adults) and balance task complexity (balance tasks with high complexity vs. balance tasks with low complexity) to examine the moderating effects of these factors on fatigue-mediated balance performance.
We identified 7 eligible studies with 9 study groups and 206 participants. Analysis revealed that performing a prolonged cognitive task had a small but significant effect (SMDwm = −0.38) on subsequent balance performance in healthy young and older adults. However, age- and task-related differences in balance responses to fatigue could not be confirmed statistically.
Overall, aggregation of the available literature indicates that mental fatigue generally reduces balance in healthy adults. However, interactions between cognitive resource reduction, aging and balance task complexity remain elusive.
Objectives
The aims of this study were to investigate the effects of a six-week in-season period of soccer training and games (congested period) on plasma volume variations (PV), hematological parameters, and physical fitness in elite players. In addition, we analyzed relationships between training load, hematological parameters and players’ physical fitness.
Methods
Eighteen elite players were evaluated before (T1) and after (T2) a six-week in-season period interspersed with 10 soccer matches. At T1 and T2, players performed the Yo-Yo intermittent recovery test level 1 (YYIR1), the repeated shuttle sprint ability test (RSSA), the countermovement jump test (CMJ), and the squat jump test (SJ). In addition, PV and hematological parameters (erythrocytes [M/mm3], hematocrit [%], hemoglobin [g/dl], mean corpuscular volume [fl], mean corpuscular hemoglobin content [pg], and mean hemoglobin concentration [%]) were assessed. Daily ratings of perceived exertion (RPE) were monitored in order to quantify the internal training load.
Results
From T1 to T2, significant performance declines were found for the YYIR1 (p<0.001, effect size [ES] = 0.5), RSSA (p<0.01, ES = 0.6) and SJ tests (p< 0.046, ES = 0.7). However, no significant changes were found for the CMJ (p = 0.86, ES = 0.1). Post-exercise, RSSA blood lactate (p<0.012, ES = 0.2) and PV (p<0.01, ES = 0.7) increased significantly from T1 to T2. A significant decrease was found from T1 to T2 for the erythrocyte value (p<0.002, ES = 0.5) and the hemoglobin concentration (p<0.018, ES = 0.8). The hematocrit percentage rate was also significantly lower (p<0.001, ES = 0.6) at T2. The mean corpuscular volume, mean corpuscular hemoglobin content and the mean hemoglobin content values were not statistically different from T1 to T2. No significant relationships were detected between training load parameters and percentage changes of hematological parameters. However, a significant relationship was observed between training load and changes in RSSA performance (r = -0.60; p<0.003).
Conclusions
An intensive period of “congested match play” over 6 weeks significantly compromised players’ physical fitness. These changes were not related to hematological parameters, even though significant alterations were detected for selected measures.
Objectives
The aims of this study were to investigate the effects of a six-week in-season period of soccer training and games (congested period) on plasma volume variations (PV), hematological parameters, and physical fitness in elite players. In addition, we analyzed relationships between training load, hematological parameters and players’ physical fitness.
Methods
Eighteen elite players were evaluated before (T1) and after (T2) a six-week in-season period interspersed with 10 soccer matches. At T1 and T2, players performed the Yo-Yo intermittent recovery test level 1 (YYIR1), the repeated shuttle sprint ability test (RSSA), the countermovement jump test (CMJ), and the squat jump test (SJ). In addition, PV and hematological parameters (erythrocytes [M/mm3], hematocrit [%], hemoglobin [g/dl], mean corpuscular volume [fl], mean corpuscular hemoglobin content [pg], and mean hemoglobin concentration [%]) were assessed. Daily ratings of perceived exertion (RPE) were monitored in order to quantify the internal training load.
Results
From T1 to T2, significant performance declines were found for the YYIR1 (p<0.001, effect size [ES] = 0.5), RSSA (p<0.01, ES = 0.6) and SJ tests (p< 0.046, ES = 0.7). However, no significant changes were found for the CMJ (p = 0.86, ES = 0.1). Post-exercise, RSSA blood lactate (p<0.012, ES = 0.2) and PV (p<0.01, ES = 0.7) increased significantly from T1 to T2. A significant decrease was found from T1 to T2 for the erythrocyte value (p<0.002, ES = 0.5) and the hemoglobin concentration (p<0.018, ES = 0.8). The hematocrit percentage rate was also significantly lower (p<0.001, ES = 0.6) at T2. The mean corpuscular volume, mean corpuscular hemoglobin content and the mean hemoglobin content values were not statistically different from T1 to T2. No significant relationships were detected between training load parameters and percentage changes of hematological parameters. However, a significant relationship was observed between training load and changes in RSSA performance (r = -0.60; p<0.003).
Conclusions
An intensive period of “congested match play” over 6 weeks significantly compromised players’ physical fitness. These changes were not related to hematological parameters, even though significant alterations were detected for selected measures.