Optimum Nutrition’s Amino Energy is one the most popular supplements on the market for energy, endurance, and recovery. There are also many great flavors beginning with our personal favorite, Concord Grape. You can take this product on training days or on your days off. There is an excellent blend of aminos in the product that do a great job of reducing soreness as well as fatigue. Amino Energy takes the cake as our best intra workout for any activity.