Sports Supplements to Push through Plateaus.* Endurance athletes are always striving for optimal performance, and sports supplementation is a very important aspect of daily training for endurance sports. Proper supplementation may help to increase speed, reduce times, and help push through fatigue for a stronger finish.* For peak performance, the body demands nutrients to stay strong, fast, and focused.* NOW® Sports offers a complete line of products for everyday athletes looking to work harder longer to meet personal goals.* All products are carefully tested for purity and potency.