Thread by @nick_krontiris

This systematic review finds that the literature overall suggests that interval training sessions performed at high intensity should include long recovery periods, as the former are likely to lead to acute changes in running kinematics as a result of muscle fatigue.

- Interval training sessions with anaerobic and short aerobic intervals (e.g., 5 ×200 m or 6 ×800 m) were found likely to produce increases in stride frequency, ground contact time and in vertical oscillation at intensities above velocity associated to V'O2max...

...suggesting muscle fatigue.

- This finding may suggest that interval training sessions performed at high intensity must include long recovery periods (2–3 min) to avoid the increase of stride frequency, contact time and vertical oscillation of the center of mass as the result of muscle fatigue.

- Sessions with long aerobic intervals (e.g., 5 ×2000 m), even with a short recovery between bouts (1-2 min), were not found likely to induce a high level of muscle fatigue or modifications in the foot strike pattern.

Acute effects of interval training on running kinematics in runners: A systematic review (open access)

doi.org/10.1016/j.gait…

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