Optimum Nutrition Gold Standard Pre-Workout 330g - watermelon flavor is a pre-workout pump and stimulant that not only increases physical but also mental endurance! It will charge you with energy and perfectly start you towards achieving your goals, Optimum Gold Standard Pre-workout is a supplement used to supply energy, support concentration, strength and also increase performance. It is a pre-workout formula that contains scientifically proven active substances and ingredients that, when used before exercise, improve physical performance, delay the onset of fatigue and improve concentration. Recommended dosage: Take 1 scoop (10 g) 20-30 minutes before training.