Creatine monohydrate is one of the most popular and best studied sports nutrition supplements ever. For more than 30 years, athletes and gym goers have relied on creatine. When used daily, it has been shown to support short-burst, high-intensity activity, as well as gains in muscle, strength, and power. Creatine works by aiding in the regeneration of ATP, the fuel source for muscle contractions. As a result, it can help you get more reps on weight training exercises, and sustain short-burst anaerobic activities—such as sprinting, jumping, and martial arts training—with greater power for longer durations.