Actually the 100m and 200m records are about the same speed. It's 9.58 for the 100m and 19.19 for the 200m. And before this August when Bolt shattered his pre

Actually the 100m and 200m records are about the same speed. It's 9.58 for the 100m and 19.19 for the 200m. And before this August when Bolt shattered his previous 100m record, the 200m record was significantly faster than the 100m. But in any case, both miles and marathons are incredibly intense workouts. In fact, from a physiological standpoint, middle distances are more intense than sprints. Less than 400m isn't even enough to push someone to their lactate threshold. Short sprints are run on the fuel already in the muscles. Obviously, it still takes intense training (and the right genes) to sprint well, though.