Movie S1

A representative subject displays the pronounced difference in center-of-mass running kinematics resulting from a change in gravity. In the first half of the video, the runner experiences normal gravity (9.8 m/s2), and exhibits large vertical excursion of the center of mass during the flight phase. In the second half of the video, the runner experiences simulated lunar gravity (approximately one-sixth of Earth-normal), and the center-of-mass excursions in flight are comparatively shallow. In both cases, the treadmill speed is 2 m/s. The video is slowed by a factor of four. Consent to publish this video was obtained from the subject depicted.

Reducing gravity takes the bounce out of running

Delyle T. Polet, Ryan T. Schroeder, and John E. A. Bertram

Journal of Experimental Biology 2018. 221:None-None; doi: 10.1242/jeb.162024