Pre-workout supplements
THESE MULTI-INGREDIENT POWDERS are so popular because they boost energy levels, mental focus, and even "muscle pumpitude" during a workout, says Rehan Jalali, certified sports nutritionist and President of the Supplement Research Foundation. In fact, a recent study in theJournal of the International Society of Sports Nutrition found that guys who took a pre-workout supplement were able to churn out more reps before failure and sprint with more power compared to guys who went into the workout au natural. A single capsule is typically packed with the most beneficial minerals and molecules for both energy and muscle building, including many of the individual ingredients on this list. Jalali suggests looking for key ingredients like L-tyrosine, caffeine, L-Arginine, and BCAAs (one good option is Pre JYM), then take one serving 30 minutes before hitting the weight room.