When your feet hardly touch the ground

日期:2019-03-07 06:06:03 作者:郎耶 阅读:

RUNNING backwards is hard work—and not just because you can’t see where you’re going. Seth Wright and Peter Weyand at Harvard University’s Museum of Comparative Zoology found that it takes 30 per cent more energy to run backwards than forwards. They say most of this difference is due to the fact that the runner’s feet spend less time on the ground in a backwards gait, meaning that their leg muscles have to kick into play faster. At high speeds, more muscles are needed to support the awkward position (The Journal of Experimental Biology, vol 204,