Take a walk through any vitamin store and you’ll find yourself lost in its aisles of pills and powders, each claiming to benefit your workouts by boosting your focus, energy or recovery. Pre-workout supplements, designed to be consumed moments before a run or a heavy lifting session, are especially hot right now, with new varieties popping up all the time. But what do they do, exactly? And are they worth the hassle—or the expense?
More »