Physics of falling says professional athletes are running wrong (New Scientist)

"To most runners and coaches, running is a series of jumps, says Svein Otto Kanstad, a physicist and former competitive runner based in Volda, Norway. Gravity isn’t considered helpful, because its force is perpendicular to the direction a runner is moving. But this mindset neglects the concept of angular momentum, Kanstad says. Rather than thinking of running as a series of jumps – leaping off one foot and landing again on the other – runners should view their sport as a series of falls, aided by gravity, he says."

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Read the full article at New Scientist.