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Muscle activation of the quadriceps and hamstrings during incremental running
Author(s) -
Camic Clayton L.,
Kovacs Attila J.,
Enquist Evan A.,
McLain Trisha A.,
Hill Ethan C.
Publication year - 2015
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.24901
Subject(s) - biceps , vastus medialis , electromyography , quadriceps femoris muscle , thigh , medicine , treadmill , physical medicine and rehabilitation , anatomy , physical therapy , isometric exercise
The aim of this study was to determine the patterns of responses for the electromyographic (EMG) amplitude vs. oxygen uptake ( V ̇ O 2 ) relationships from muscles of the quadriceps femoris and hamstrings during incremental treadmill running. Methods: Twelve men volunteered to perform an incremental test to exhaustion while EMG signals were recorded from the vastus lateralis, vastus medialis, biceps femoris, and semitendinosus muscles. Polynomial regression analyses were used to determine the best model fit for the EMG amplitude vs. V ̇ O 2 relationships. Results: There were significant ( P < 0.05) increases in EMG amplitude across V ̇ O 2 for the vastus lateralis (quadratic, R = 0.995), vastus medialis (quadratic, R = 0.997), biceps femoris (cubic, R = 0.999), and semitendinosus (linear, R = 0.992) muscles as well as the hamstrings‐to‐quadriceps ratio (cubic, R = 0.999). Conclusion: These findings indicate that the patterns of responses for muscle activation vs. exercise intensity appear to be unique among muscles of the thigh. Muscle Nerve 52 : 1023–1029, 2015