The present study was a quantitative investigation into the substitution patterns and other fatigue-related characteristics of the muscles of the upper leg during dynamic activity. Subjects performed fatigue-inducing leg extensions under varied force and velocity conditions. Electromyographic (EMG) data revealed subject dependent muscle substitution patterns that varied as a function of force/velocity combinations. The results also indicate an interaction between leg angle dependent variables and fatigue. Explanations for these effects are discussed.
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References
1.
Bigland-RitchieB. (1981). EMG/force relations and fatigue of human voluntary contractions. Exercise Sport Science Review, 9, 75–117.
2.
LippoldO.C.RedfearnW.T.VucoJ. (1960). The electromyography of fatigue. Ergonomics, 3, 121–131.
3.
MaquetP.G.J. (1984). Biomechanics of the Knee. Berlin: Springer-Verlag.
4.
PetrofskyJ.S.GlaserR.M.PhillipsC.A. (1982). Evaluation of the amplitude and frequency components of the surface EMG as an index of muscle fatigue. Ergonomics, 25(3), 213–223.
5.
PetrofskyJ.S.LindA.R. (1980). Frequency analysis of the surface electromyography during sustained isometric contractions. European Journal of Applied Physiology, 43, 173–182.
6.
PrinceF.P.HikidaR.S.HagermanR.C.. (1976) Human muscle fiber types in power lifters, distance runners and untrained subjects, Pfluqers Archives, 363, 19–26.
7.
ThorstenssonA.KarlssonJ.. (1976) Fatiguability and fibre composition of human skeletal muscle, Acta physioiogica Scandanavica, 98, 318–322.
