… More than 420,000 participants, from first timers to seasoned athletes, have trained with TNT and achieved their best at marathons, half marathons, triathlons, 100-mile century bike rides and hiking adventures. Train with the best to meet your challenge! TNT is the world's first, best and largest charity sports training program - and the only one to offer a full complement of exciting, sports training options. No matter your sport, TNT offers: Great people. Our certified coaches provide excepti …