Coming from Amber Bodily, Master FootZoner, Master Herbalist and triathlete and a triathlete coach in the past:

Pre-workout smoothie for energy, focus, and endurance boost:

2-3 cups fresh squeezed OJ, 1 tsp Spirulina, 2 tsp Barley grass JuicePowder, 1 banana, 2 tsp of Amla powder, 1/3 c organic hemp seeds. While drinking it, take 1 capsule of Methylfolate 5mg. This will help the body with metabolic exchanges and the body is working out. For flavor he can add some organic strawberries or mangoes.