NEWS YOU CAN USE: Chocolate Can Boost Your Workout. Really. “Each of the cyclists performed better in most of the physical tests after two weeks of supplementing with dark chocolate, compared to baseline results and after they had eaten white chocolate. The riders utilized less oxygen to ride at a moderate pace, a change that would generally allow them to ride longer or harder before tiring; and they covered more distance during a two-minute, all-out time trial, meaning that their anaerobic, sprinting ability had been enhanced.”