Rapid muscle mass gain. Bulking up Ideal for hardgainers. Use if training for more than 2 hours per day.. Increasing strength & energy for sport & workouts High calorie nutrient dense source of protein for growth & carbohydrates for fuel. Maintaining muscle mass when doing high levels of cardiovascular fitness training. Used by anyone wanting a high calorie mass gain fuel. Strength athletes bodybuilders weightlifters. Power athletes such as rugby players wrestlers field event athl