Straight arms or bent? For walking, it's clear. For running, less so
by Nur Pirbhai from Science | The Guardian on (#4JTY5)
The way we walk is very efficient, but runners' bent-arm bias is not so straightforward
It is a question that perhaps only a scientist would ask and try to answer: why do we walk with straight arms but run with them bent?
Months after the conundrum struck Andrew Yegian as he strolled across campus at Harvard, he has part of the answer.
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