Preferred step frequency during downhill running may be determined by muscle activity.

@article{Sheehan2013PreferredSF,
  title={Preferred step frequency during downhill running may be determined by muscle activity.},
  author={Riley C. Sheehan and Jinger S. Gottschall},
  journal={Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology},
  year={2013},
  volume={23 4},
  pages={826-30}
}
It is well established that metabolic cost is minimized at an individual's running preferred step frequency (PSF). It has been proposed that the metabolic minimum at PSF is due to a tradeoff between mechanical factors, however, this ignores muscle activity, the primary consumer of energy. Thus, we hypothesized that during downhill running, total muscle activity would be greater with deviations from PSF. Specifically, we predicted that slow step frequencies would have greater stance activity… CONTINUE READING
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