Activity patterns of human skeletal muscles: relation to muscle fiber type composition

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Science  21 Apr 1978:
Vol. 200, Issue 4339, pp. 314-317
DOI: 10.1126/science.635587


The muscle activity of normal ambulatory individuals was recorded continuously for 8-hour (working day) periods. Parameters of activity patterns were defined and numerical outcomes for these parameters were compared across a diverse population of muscles. Several pattern parameters, such as the average percentage of time active, were highly correlated with the percentage of type I fibers of a muscle.