The interaction between the location of lower extremity muscle fatigue and visual condition on unipedal postural stability

2012 ◽  
Vol 112 (10) ◽  
pp. 3495-3502 ◽  
Author(s):  
Manijeh Soleimanifar ◽  
Mahyar Salavati ◽  
Behnam Akhbari ◽  
Mojgan Moghadam
Keyword(s):  
Lower Extremity ◽  
Muscle Fatigue ◽  
Postural Stability ◽  
Visual Condition ◽  
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.

scholarly journals The Effect of Lower Extremity Muscle Fatigue on Dynamic Postural Control Analyzed by Electromyography

2016 ◽  
Vol 6 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Majid Fatahi ◽  
Gholam Ali Ghasemi ◽  
Yosef Mongashti Joni ◽  
Vahid Zolaktaf ◽  
Faraj Fatahi ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Postural Control ◽  
Muscle Fatigue ◽  
Lower Extremity Muscle

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.

scholarly journals Effects of lower extremity muscle fatigue on the outcomes of slip-induced falls

Ergonomics ◽  
2008 ◽  
Vol 51 (12) ◽  
pp. 1873-1884 ◽  
Author(s):  
Prakriti Parijat ◽  
Thurmon E. Lockhart
Keyword(s):  
Lower Extremity ◽  
Muscle Fatigue ◽  
Lower Extremity Muscle
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