Running 30m at 97 percent is metabolically powered by the phosphocreatine system .
3 minutes of walking will allow that system to replenish nearly all of ATP needed for the next 30m sprint .
Running 30m at 97 percent is metabolically powered by the phosphocreatine system , and 3 minutes of walking will allow that system to replenish nearly all of ATP needed for the next 30m sprint .