Research Paper: The Effects of Lower Extremity Muscle Fatigue on Dynamic Balance in Volleyball Players (original) (raw)
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The Effects of Lower Extremity Muscle Fatigue on Dynamic Balance in Volleyball Players
Iranian Rehabilitation Journal, 2021
Objectives: Lower extremity muscles are critical for maintaining dynamic balance and athletic performance. Fatigue of these muscles may affect dynamic balance. It is unclear whether fatigue in a particular muscle group can affect dynamic balance more than that in other groups. This study was conducted to evaluate and compare the effects of fatigue in 5 muscle groups on dynamic balance in volleyball players. Methods: Fifteen healthy male volleyball players separately performed the Star Excursion Balance Test before and immediately after the occurrence of fatigue of ankle Plantar Flexor (PF), knee extensor, knee flexor, hip abductor, and hip adductor muscles. Composite reach distance and distance in anterior, posteromedial, and posterolateral directions were recorded, accordingly. Results: Repeated-measures Analysis of Variance (ANOVA) data indicated that fatigue of all muscle groups significantly decreased the mean score of composite (P<0.001). Anterior, posteromedial, and postero...
Biomedical Human Kinetics
Study aim: To investigate the effect of fatigue, induced by a volleyball training game on the risk of Anterior Cruciate Ligament (ACL) injury. Material and methods: Thirteen female volleyball college athletes, ages 18 to 21 years old, completed jump landings from a box 30 cm height, prior and post a 60-minute volleyball training game. The clinical tool Landing Error Scoring System (LESS) was employed in order to evaluate the technique of landing prior and post the game. The level of fatigue induced by the volleyball game was assessed by vertical jump test and Borg Rating of Perceived Exertion (RPE) Scale pre and post-game. In order to compare measurements pre and post-game t-tests for dependent samples were used. Results: Participants performed lower vertical jumps post-game with a Confidence Interval of 26.2 ± 2.3 cm (pre-game) and 24.9 ± 2.2 cm (post game). The difference between pre and post-game was found to be statistically significant with a t12 = 2.55 and a p-value of 0.026. ...
Journal of Strength and Conditioning Research, 2012
Zech, A, Steib, S, Hentschke, C, Eckhardt, H, and Pfeifer, K. Effects of localized and general fatigue on static and dynamic postural control in male team handball athletes. J Strength Cond Res 26(4): 1162-1168, 2012-In team sports, sensorimotor impairments resulting from previous injuries or muscular fatigue have been suggested to be factors contributing to an increased injury risk. Although it has been widely shown that physical fatigue affects static postural sway, it is still questionable as to what extent these adaptations are relevant for dynamic, sportsrelated situations. The objective of this study was to determine the effects of whole-body and localized fatigue on postural control in stable and unstable conditions. Nineteen male team handball players were assessed in 2 sessions separated by 1 week. Treadmill running and single-leg step-up exercises were used to induce physical fatigue. The main outcome measures were center of pressure (COP) sway velocity during a single-leg stance on a force plate and maximum reach distances of the star excursion balance test (SEBT). The COP sway velocity increased significantly (p , 0.05) after general (+47%) and localized fatigue (+10%). No fatigue effects were found for the SEBT. There were no significant correlations between COP sway velocity and SEBT mean reach in any condition. The results showed that although fatigue affects static postural control, sensorimotor mechanisms responsible for regaining dynamic balance in healthy athletes seem to remain predominantly intact. Thus, our data indicate that the exclusive use of static postural sway measures might not be sufficient to allow conclusive statements regarding sensorimotor control in the noninjured athlete population. Prospective analysis of ice hockey injuries at the Junior A level over the course of one season. Clin J Sport Med 9: 70-74, 1999. 25. Plisky, PJ, Rauh, MJ, Kaminski, TW, and Underwood, FB. Star Excursion Balance Test as a predictor of lower extremity injury in high school basketball players. J Orthop Sports Phys Ther 36: 911-919, 2006. 26. Prieto, TE, Myklebust, JB, Hoffmann, RG, Lovett, EG, and Myklebust, BM. Measures of postural steadiness: Differences between healthy young and elderly adults. IEEE Trans Biomed Eng 43: 956-966, 1996.
Ankle Bracing, Fatigue, and Time to Stabilization in Collegiate Volleyball Athletes
Journal of Athletic Training, 2008
Context: Fatigue has been shown to disrupt dynamic stability in healthy volunteers. It is not known if wearing prophylactic ankle supports can improve dynamic stability in fatigued athletes. Objective: To determine the type of ankle brace that may be more effective at providing dynamic stability after a jump-landing task during normal and fatigued conditions. Design: Two separate repeated-measures analyses of variance with 2 within-subjects factors (condition and time) were performed for each dependent variable. Setting: Research laboratory. Patients or Other Participants: Ten healthy female collegiate volleyball athletes participated (age 5 19.5 6 1.27 years, height 5 179.07 6 7.6 cm, mass 5 69.86 6 5.42 kg). Intervention(s): Athletes participated in 3 separate testing sessions, applying a different bracing condition at each session: no brace (NB), Swede-O Universal lace-up ankle brace (AB), and Active Ankle brace (AA). Three trials of a jump-landing task were performed under each condition before and after induced functional fatigue. The jump-landing task consisted of a singleleg landing onto a force plate from a height equivalent to 50% of each participant's maximal jump height and from a starting position 70 cm from the center of the force plate. Main Outcome Measure(s): Time to stabilization in the anterior-posterior (APTTS) and medial-lateral (MLTTS) directions. Results: For APTTS, a condition-by-time interaction existed (F 2,18 5 5.55, P 5 .013). For the AA condition, Tukey post hoc testing revealed faster pretest (2.734 6 0.331 seconds) APTTS than posttest (3.817 6 0.263 seconds). Post hoc testing also revealed that the AB condition provided faster APTTS (2.492 6 0.271 seconds) than AA (3.817 6 0.263 seconds) and NB (3.341 6 0.339 seconds) conditions during posttesting. No statistically significant findings were associated with MLTTS. Conclusions: Fatigue increased APTTS for the AA condition. Because the AB condition was more effective than the other 2 conditions during the posttesting, the AB appears to be the best option for providing dynamic stability in the anteriorposterior direction during a landing task.
Fatigue-Induced Balance Impairment in Young Soccer Players
Journal of Athletic Training, 2014
Context: Although balance is generally recognized to be an important feature in ensuring good performance in soccer, its link with functional performance remains mostly unexplored, especially in young athletes.
Biology of Exercise
Good postural control provides inherent protection against lower limb joint injuries and several studies have been implemented in order to examine the effect of fatigue as an unavoidable component of daily activities and sport exercises on neuromuscular control and lower limb stability but none of them have dealt with the impact of fatigue resulting from the simulated activities of the matches. Thus, the purpose of this study is to examine the effect of the fatigue related to functional and simulated activities of Badminton players on dynamic postural control. Twenty healthy students of the major of physical education who had played badminton for at least two years (age: 21.4 ± 1.63 Yr, weight: 72.1 ± 5.2 kg, height: 175.12 ± 3.5 cm) volunteered to participate in this study. Pretest of Y balance test (YBT), the protocol of functional fatigue composed of six stages, and post -test of YBT were performed. A Multi -variable variance analysis (MONOVA) and paired t -test were used in order to analyze the data. The findings demonstrated a significant difference between the performance of the subjects of the two groups in three directions and the total score of YBT that indicated a decrease in the dynamic postural control after functional fatigue. The results of the study support the hypothesis of the effect of functional fatigue on the decrease in the dynamic postural control of Badminton players. Therefore, they may be in danger of lower extremity injuries.
Research consistently demonstrates that ankle and knee injuries are the most common injury suffered in the athletic population. Ankle injuries are among the main prevailing injuries that occur in football game players. The aim of this study was to investigate the Influence of fatigue protocol on dynamic postural-control task in soccer players with functional ankle instability. Methods: In these study twenty-nine soccer players who were selected by convenience sampling method and were randomly divided into two experimental groups (n=13) and control groups (n=16) with (age: 22.3±2.1 years and height: 176.5±4.4 cm) volunteered as subjects. Semi dynamic by Biodex balance system (BBS) and dynamic balance by Star Excursion Balance test (SEBT) were taken before and after semi-soccer fatigue protocol. For comparison of means groups Repeated measures (GLM-ANOVA) were used and the results were determined within the significance level of (P≤0.05). Results: After fatigue program, semi-dynamic balance on the positions of overall, anterior-posterior and Medial-lateral in both groups reduced significantly (P<0.05). Moreover, the variations of between groups were significant on the all directions of semi-dynamic balance (P<0.05). Also, After fatigue, The Dynamic balance score on the all directions of star Excursion Balance test in both groups reduced significantly (p<0.001). The variations of between groups were significant on the all directions of dynamic balance (P<0.05). Conclusions: At the end of soccer game, the fatigue can significantly reduce semi dynamic and dynamic balance, especially in players with functional ankle instability and probably enhances risk of injury.
Journal of Human Sport and Exercise, 2019
The relationship between balance, knee muscle strength, jump height and risk of injury has not been clearly stated in female volleyball athletes. The study was to determine whether a correlation exists between knee joint isokinetic muscle strength, risk of injury, balance and jump height in female volleyball athletes. Twenty-two female volleyball athletes were involved into the study. Knee muscle strength were evaluated with the Biodex 3® isokinetic dynamometer. Jump performances were evaluated with the countermovement (CMJ) jump test using the Vert Jump® Motion Sensitive Sensor. The injury risk for all players were evaluated by the Functional Movement Screen (FMS®). Balance measurements were performed with a dynamometer Biodex Systems 3® device. There was a significant relationship between CMJ height, knee flexion and extension peak torque and H:Q ratio values at two angular velocities, dynamic balance and total FMS® scores (p.05). We suggest that all clinicians and coaches involve...
Comparison of static and dynamic balance among male Amateur basketball players
International journal of physical education, sports and health, 2016
Title: Comparison of static and dynamic balance among male amateur basketball Players. Background: The purpose of this study was to examine the relationship between Star Excursion Balance Test reach distance and lower extremity injury among male basketball players. In this study we can expected that reach distance will be normalized to limb length would be related to risk of lower extremity injury. Balance Error Scoring System is done to determine balance performance on subject before Players start to playing games. Objective: The importance of this study is to determine effect on Swiss ball exercise of static balance among male basketball players. The importance of this study is to determine the effect on plyometric push up of dynamic balance among the male basketball players. Design: An Experimental design. Subject: 30 subjects were divided into two group. First 15 subject were assessed with Swiss ball exercise for static balance and another group will be assessed with plyometric ...