scholarly journals The Effects of Lower Extremity Muscle Fatigue on Dynamic Balance in Volleyball Players

2021 ◽  
Vol 19 (1) ◽  
pp. 51-58
Author(s):  
Nastaran Ghotbi ◽  
Keyword(s):  
Lower Extremity ◽  
Muscle Fatigue ◽  
Repeated Measures ◽  
Dynamic Balance ◽  
Knee Extensors ◽  
Balance Test ◽  
Lower Extremity Muscle ◽  
Adductor Muscles ◽  
Volleyball Players ◽  
Muscle Groups

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 posterolateral distance scores decreased following muscle fatigue of knee extensors and ankle PFs (P<0.05). Discussion: This study suggested that regarding composite reach score, fatigue of ankle, knee, and hip muscles similarly decreased dynamic balance. However, evaluating three main directions revealed that knee extensors and ankle PFs muscles fatigue presented more prominent effects on the explored volleyball players’ balance, compared to the other muscles.

Lower Extremity Muscle Activation During a Dynamic Balance Test in Women 40-60 Years

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S188
Author(s):  
Lucinda E. Bouillon ◽  
D. K. Sklenka ◽  
A. Driver ◽  
Y. Ichino
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Dynamic Balance ◽  
Balance Test ◽  
Lower Extremity Muscle

Comparison of lower limb muscle activity during the dynamic balance test between baseball pitchers and healthy young adults

2020 ◽  
pp. 1-7
Author(s):  
Jeongwoo Jeon ◽  
Jiyeon Lee ◽  
Jiheon Hong ◽  
Jaeho Yu ◽  
Jinseop Kim ◽  
...  
Keyword(s):  
Young Adults ◽  
Muscle Activity ◽  
Vastus Lateralis ◽  
Dynamic Balance ◽  
Neuromuscular Control ◽  
Surface Emg ◽  
Knee Extensors ◽  
Balance Test ◽  
Lower Extremity Muscle ◽  
Baseball Pitchers

BACKGROUND: Dynamic balance is an essential factor for efficient pitching by baseball pitchers. OBJECTIVE: To compare distances reached and lower-extremity muscle activity during the star excursion balance test (SEBT) in baseball pitchers and healthy young adults. METHODS: Nineteen baseball pitchers (BPG) and 20 healthy adults (HAG) were recruited. Surface EMG was used to measure the activity of vastus medialis (VM), vastus lateralis (VL), tibialis anterior, and lateral gastrocnemius. RESULTS: The BPG exhibited greater dynamic balance than in the HAG (p< 0.05) in the posteromedial (PM) and posterolateral (PL) directions. For the PM and PL directions, significantly greater muscle activity of VM and VL was found in the BPG than in the HAG (p< 0.05). CONCLUSION: SEBT performance is characterized by high-level VM and VL muscle activities. Neuromuscular control of knee extensors, such as the VM and VL of pitchers, might affect the dynamic balance measured by the SEBT.

Lower Extremity Muscle Activation During a Dynamic Balance Test in Women 40-60 Years

2004 ◽  
Vol 36 (Supplement) ◽  
pp. S188
Author(s):  
Lucinda E. Bouillon ◽  
D. K. Sklenka ◽  
A. Driver ◽  
Y. Ichino
Keyword(s):  
Lower Extremity ◽  
Muscle Activation ◽  
Dynamic Balance ◽  
Balance Test ◽  
Lower Extremity Muscle

scholarly journals Role of Occupational Footwear and Prolonged Walking on Lower Extremity Muscle Activation during Maximal Exertions and Postural Stability Tasks

Biomechanics ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 202-213
Author(s):  
Harish Chander ◽  
Sachini N. K. Kodithuwakku Arachchige ◽  
Alana J. Turner ◽  
Reuben F. Burch V ◽  
Adam C. Knight ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Muscle Activity ◽  
Repeated Measures ◽  
Postural Stability ◽  
Muscle Activation ◽  
Medial Gastrocnemius ◽  
Lower Extremity Muscle ◽  
Prolonged Duration ◽  
The Mean ◽  
The Impact

Background: Occupational footwear and a prolonged duration of walking have been previously reported to play a role in maintaining postural stability. The purpose of this paper was to analyze the impact of three types of occupational footwear: the steel-toed work boot (ST), the tactical work boot (TB), and the low-top work shoe (LT) on previously unreported lower extremity muscle activity during postural stability tasks. Methods: Electromyography (EMG) muscle activity was measured from four lower extremity muscles (vastus medialis (VM), medial hamstrings (MH), tibialis anterior (TA), and medial gastrocnemius (MG) during maximal voluntary isometric contractions (MVIC) and during a sensory organization test (SOT) every 30 min over a 4 h simulated workload while wearing ST, TB, and LT footwear. The mean MVIC and the mean and percentage MVIC during each SOT condition from each muscle was analyzed individually using a repeated measures ANOVA at an alpha level of 0.05. Results: Significant differences (p < 0.05) were found for maximal exertions, but this was limited to only the time main effect. No significant differences existed for EMG measures during the SOT. Conclusion: The findings suggest that occupational footwear type does not influence lower extremity muscle activity during both MVIC and SOT. Significantly lower muscle activity during maximal exertions over the course of the 4 h workload was evident, which can be attributed to localized muscular fatigue, but this was not sufficient to impact muscle activity during postural stability tasks.

Influence of Bicycle Seat Tube Angle and Hand Position on Lower Extremity Kinematics and Neuromuscular Control: Implications for Triathlon Running Performance

2011 ◽  
Vol 27 (4) ◽  
pp. 297-305 ◽  
Author(s):  
Amy Silder ◽  
Kyle Gleason ◽  
Darryl G. Thelen
Keyword(s):  
Lower Extremity ◽  
Neuromuscular Control ◽  
Rectus Femoris ◽  
Body Motion ◽  
Treadmill Running ◽  
Whole Body ◽  
Knee Extensors ◽  
Hand Position ◽  
Plantar Flexors ◽  
Lower Extremity Muscle

We investigated how varying seat tube angle (STA) and hand position affect muscle kinematics and activation patterns during cycling in order to better understand how triathlon-specific bike geometries might mitigate the biomechanical challenges associated with the bike-to-run transition. Whole body motion and lower extremity muscle activities were recorded from 14 triathletes during a series of cycling and treadmill running trials. A total of nine cycling trials were conducted in three hand positions (aero, drops, hoods) and at three STAs (73°, 76°, 79°). Participants also ran on a treadmill at 80, 90, and 100% of their 10-km triathlon race pace. Compared with cycling, running necessitated significantly longer peak musculotendon lengths from the uniarticular hip flexors, knee extensors, ankle plantar flexors and the biarticular hamstrings, rectus femoris, and gastrocnemius muscles. Running also involved significantly longer periods of active muscle lengthening from the quadriceps and ankle plantar flexors. During cycling, increasing the STA alone had no affect on muscle kinematics but did induce significantly greater rectus femoris activity during the upstroke of the crank cycle. Increasing hip extension by varying the hand position induced an increase in hamstring muscle activity, and moved the operating lengths of the uniarticular hip flexor and extensor muscles slightly closer to those seen during running. These combined changes in muscle kinematics and coordination could potentially contribute to the improved running performances that have been previously observed immediately after cycling on a triathlon-specific bicycle.

Prediction of the Lower Extremity Muscle Forces During Stair Ascent and Descent

2008 ◽  
Author(s):  
Ali Selk Ghafari ◽  
Ali Meghdari ◽  
Gholam Reza Vossoughi
Keyword(s):  
Lower Extremity ◽  
Inverse Dynamics ◽  
Sagittal Plane ◽  
Optimization Technique ◽  
The Elderly ◽  
Plantar Flexors ◽  
Stair Ascent ◽  
Lower Extremity Muscle ◽  
Anatomical Classification ◽  
Muscle Groups

An inverse dynamics musculoskeletal model of the lower extremity was combined with an optimization technique to estimate individual muscular forces and powers during stair ascent and descent. Eighteen Hill-type musculotendon actuators per leg were combined into the eleven functional muscle groups based on anatomical classification to drive the model in the sagittal plane. Simulation results illustrate the major functional differences in plantar flexors of the ankle and extensors of the knee and hip joints during ascent and descent. The results of this study not only could be employed to evaluate the rehabilitation results in the elderly but also could be used to design more anthropometric assistive devices with optimum power consumption.

Differences in Static- and Dynamic-Balance Task Performance After 4 Weeks of Intrinsic-Foot-Muscle Training: The Short-Foot Exercise Versus the Towel-Curl Exercise

2012 ◽  
Vol 21 (4) ◽  
pp. 327-333 ◽  
Author(s):  
Scott K. Lynn ◽  
Ricardo A. Padilla ◽  
Kavin K.W. Tsang
Keyword(s):  
Task Performance ◽  
Outcome Measures ◽  
Repeated Measures ◽  
Mixed Model ◽  
Center Of Pressure ◽  
Dynamic Balance ◽  
Weight Bearing ◽  
Static Balance ◽  
Balance Test ◽  
Balance Task

Context:Proper functioning of the intrinsic foot musculature (IFM) is essential in maintaining the integrity of the medial longitudinal arch (MLA). Improper functioning of the IFM leads to excessive pronation of the foot, which has been linked to various pathologies. Therefore, training the IFM to avoid excessive pronation may help prevent some of these pathologies; however, it is not clear how to train these muscles optimally.Objective:To investigate the effects of 2 different types of IFM training on the height of the MLA and static- and dynamic-balance task performance.Design:Randomized controlled trial, repeated-measures mixed-model design.Setting:University biomechanics laboratory for testing and a home-based training program.Participants:24 healthy, university-age volunteers (3 groups of 8) with no history of major lower limb pathology or balance impairment.Interventions:One experimental group performed 4 wk of the short-foot exercise (SFE) and the other performed 4 wk of the towel-curl exercise (TCE). Participants were asked to perform 100 repetitions of their exercise per day.Main Outcome Measures:Navicular height during weight bearing, the total range of movement of the center of pressure (COP) in the mediolateral (ML) direction for a static-balance test and a dynamic-balance test.Results:There were no differences in the navicular height or static-balance tests. For the dynamic-balance test, all groups decreased the ML COP movement on the dominant limb by a small amount (~5 mm); however, the SFE group was able to decrease COP movement much more than the TCE group in the nondominant limb.Conclusions:The SFE appeared to train the IFM more effectively than the TCE; however, there were differing results between the dominant and nondominant legs. These imbalances need to be taken into consideration by clinicians.

scholarly journals USING COACHING TECHNIQUES IN ASSESSING AND DEVELOPING THE STATIC AND DYNAMIC BALANCE LEVEL OF YOUNG VOLLEYBALL PLAYERS

2021 ◽  
Vol 14(63) (1) ◽  
pp. 89-100
Author(s):  
I.S. SOPA ◽  
◽  
M. POMOHACI ◽  
Keyword(s):  
Dynamic Balance ◽  
Skill Training ◽  
Static Balance ◽  
Balance Test ◽  
Initial Testing ◽  
Sport Team ◽  
Volleyball Players ◽  
Balance Skill

An important skill in today's volleyball game is dynamic and static balance, so our investigation focused on assessing and developing balance at young volleyball players using the Y balance test. The sample was formed by 25 female volleyball players with age between 10.22 ± 2.49 years that were active at the ACS Alpha Sport Team from Sibiu. The results showed improved performances of our players from the initial testing compared with the final testing in all directions of movement, proving that balance skill training can be an important aspect in the modern volleyball game

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