ive been getting into my sprints mainly trying to get my 40 dash up, posibly for some college foot ball, the guys in the olympics quads are huge, is this mainly due to the sprints or more to weight training them, figure a little both, how many of you guys sprint, how much, how often, how intense, i do somtimes get some shin splints if i sprint more than a couple times a week, you guys get any shin splints? i think i might try keeping it to once a week after a lower body workout?