lets assume for a second that the legs give him an advantage because they don't fatigue like normal peoples calves would. ok, that's fine, but most of the power in a sprint doesn't even come from the calves, does it? the metal legs aren't adding anything, they're just returning the energy. wouldn't metal legs, while they would relieve potential exhaustion from the calves, add significant stress to the quads and hamstrings? and wouldn't those then tire much more quickly than in the average runner? i'm curious because i'm skeptical about an advantage.