Slow-twitch fiber glycogen depletion elevates moderate-exercise fast-twitch fiber activity and O2 uptake.

@article{Krustrup2004SlowtwitchFG,
  title={Slow-twitch fiber glycogen depletion elevates moderate-exercise fast-twitch fiber activity and O2 uptake.},
  author={Peter Krustrup and Karin S{\"o}derlund and Magni Mohr and Jens Bangsbo},
  journal={Medicine and science in sports and exercise},
  year={2004},
  volume={36 6},
  pages={973-82}
}
PURPOSE We tested the hypotheses that previous glycogen depletion of slow-twitch (ST) fibers enhances recruitment of fast-twitch (FT) fibers, elevates energy requirement, and results in a slow component of VO2 during moderate-intensity dynamic exercise in humans. METHODS Twelve healthy, male subjects cycled for 20 min at approximately 50% VO2max with normal glycogen stores (CON) and with exercise-induced glycogen depleted ST fibers (CHO-DEP). Pulmonary VO2 was measured continuously and single… CONTINUE READING
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