“This sounds a little bigger.”Advertisement Continue reading the main storyGiven the scoliosis and discrepancy in the length of Bolt’s legs, Mero said, the sprinter’s stride appeared optimal for him. At its most basic, speed is the product of stride length times stride frequency. For Olympic-caliber sprinters, that peak force can equal five times their body weight, providing lift and propulsion to begin the next stride. This gives him slightly more time to generate force with the left leg, Weyand said, providing greater lift off the ground. Ralph Mann, a pioneering biomechanics researcher in the United States, said he could detect a kind of gallop in Bolt’s uneven stride.

Source: New York Times July 20, 2017 09:00 UTC