• Most people tend to walk with their elbows slightly bent. • Most people tend to run with their elbows acutely bent. • No-one knows why. There is however, a(n) hypothesis. It’s the ‘Mechanical Tradeoff Hypothesis.’ which was descibed by Andrew K. Yegian, Yanish Tucker, Stephen Gillinov and Daniel E. Lieberman in their 2019 paper […]