RTD Pre-Workout Drinks are pre-mixed drinks that boost energy, focus and increase performance during exercise. They are designed to stimulate your body by providing you the energy you need to get through a gruelling workout. Help support muscular endurance and combat muscular fatigue. EXPLOSIVE ENERGY — Unlock explosive energy with caffeine for superhuman performance. MUSCULAR ENDURANCE — Supercharge endurance with the full-body sensory experience of fatigue-fighting Beta-Alanine. MUSCLE CELL HYDRATION — Naturally-derived betaine from beets, BetaPower® Betaine helps maintain cellular hydration within the muscle during periods of intense stress*. INCREDIBLE FLAVOR — Refreshing and mouthwatering flavors and made without artificial colors or dyes.