Energetically optimal stride frequency is maintained with fatigue in trained ultramarathon runners

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Energetically optimal stride frequency is maintained with fatigue in trained ultramarathon runners

At a given running speed, humans naturally endeavor to achieve an optimal stride frequency that minimizes metabolic cost. Research has suggested that runners select this near optimal stride frequency in some process of self-optimization even during fatiguing tasks up to 1-h of high-intensity running. Here, we studied whether runners demonstrate a similar self-optimizing capability after an ultramarathon of 6 hours.

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