that fast, they are not on drugs" is how they crank out 9.8 or 9.7 runs one after another, like it is no big thing. running those twice in one day even. in reality, a 9.9 run is a crushing event to your body, not something you can repeat often even if you are one of the best in the world. the drugs help them recover much faster. you will notice tyson gay and christophe lemaitre, and other clean sprinte