Cycling efficiency is related to the percentage of type I muscle fibers.

  title={Cycling efficiency is related to the percentage of type I muscle fibers.},
  author={Edward F. Coyle and Labros S. Sidossis and Jeffrey F. Horowitz and Jess Beltz},
  journal={Medicine and science in sports and exercise},
  volume={24 7},
We determined that the variability in the oxygen cost and thus the caloric expenditure of cycling at a given work rate (i.e., cycling economy) observed among highly endurance-trained cyclists (N = 19; mean +/- SE; VO2max, 4.9 +/- 0.1 l.min-1; body weight, 71 +/- 1 kg) is related to differences in their % Type I muscle fibers. The percentage of Type I and II muscle fibers was determined from biopsies of the vastus lateralis muscle that were histochemically stained for ATPase activity. When… CONTINUE READING
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