The effects of fatigue on synergy of selected lower limb muscles during running

The purpose of this study was to investigate the effect of fatigue on selected lower extremity muscles synergy during running using non-negative matrix factorization algorithm method. Sixteen male recreational runners participated in this study. The surface electromyographic activity of rectus femor...

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Bibliographic Details
Published in:Journal of biomechanics Vol. 103; p. 109692
Main Authors: Hajiloo, Behrouz, Anbarian, Mehrdad, Esmaeili, Hamed, Mirzapour, Mahdi
Format: Journal Article
Language:English
Published: United States Elsevier Ltd 16.04.2020
Elsevier Limited
Subjects:
Adhesives
Adult
Algorithms
Central nervous system
Electrodes
Electromyography
Exercise Test - methods
Factorization
Fatigue
Fatigue - physiopathology
Fitness equipment
Heart rate
Humans
Kinematics
Lower Extremity - physiopathology
Male
Muscle synergy
Muscle, Skeletal - physiopathology
Muscles
Muscular fatigue
Nervous system
Non-negative matrix factorization algorithm
Pressure distribution
Running
Running - physiology
Treadmills
Weight
New York
Running
Fatigue
Muscle synergy
Non-negative matrix factorization algorithm
ISSN:0021-9290, 1873-2380, 1873-2380
Online Access:Get full text
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Summary:The purpose of this study was to investigate the effect of fatigue on selected lower extremity muscles synergy during running using non-negative matrix factorization algorithm method. Sixteen male recreational runners participated in this study. The surface electromyographic activity of rectus femoris (RF), vastus lateralis (VL), vastus medialis (VM), biceps femoris (BF), semitendinosus, gastrocnemius medialis (GM), soleus (SO) and tibialis anterior (TA) were recorded on treadmill at 3.3 m s−1 before and after the fatigue protocol. Synergy pattern and relative muscle weight were calculated by non-negative matrix factorization (NNMF) algorithm method. The results showed that using the VAF method, five muscle synergies were extracted from the emg data during running. After the fatigue, the number of muscular synergies did not show a change, but relative weight of the muscles changed. Fatigue did not have any effect on the structure of muscular synergy, but changed the relative weight of muscles. These changes could be the strategy of the central nervous system to maintain optimal function of the motor system.
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ISSN:0021-9290
1873-2380
1873-2380
DOI:10.1016/j.jbiomech.2020.109692