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Motor unit recruitment as reflected by muscle fibre glycogen loss in a prosimian (bushbaby) after running and jumping
  1. C. A. Gillespie,
  2. D. R. Simpson,
  3. V. Reggie Edgerton2
  1. Neuromuscular Research Laboratory, University of California, Los Angeles, California, U.S.A.
  2. Brain Research Institute, University of California, Los Angeles, California, U.S.A.

    Abstract

    A qualitative histochemical assessment of glycogen loss in biopsies was made in bush-babies after running and jumping. Glycogen loss was related to the specific type of exercise. After running, glycogen loss was greatest in the slow-twitch oxidative fibre and depletion in the fast-twitch oxidative glycolytic fibres was similarly greater than in the fast-twitch glycolytic fibres. After jumping, the opposite pattern of glycogen utilization occurred (FG>FOG>SO).

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    Footnotes

    • 2 Address for correspondence: V. Reggie Edgerton, Department of Kinesiology, Neuromuscular Research Laboratory and Brain Research Institute, University of California, Los Angeles, California 90024, U.S.A.

    • 1 These data in part were presented to the Second Annual meeting for the Society of Neurosciences, Houston, 1972. The work was supported in part by USPHS NS-10497 and the Biomedical Sciences Support Grant, UCLA.

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