That might be worse! Athletes frequently abuse their bodies worse than people who are trying to lose weight. Your choice. But I hope you are under a doctor's care. A GP, not a sports doctor! If you're a professional athlete, your whole life revolves around this, and your income depends on it, you might do a rational risk analysis and decide that this risk is worth it. But if this sport doesn't dominate your life, think it over. That said, who am I to talk? The lifelong caffeine addict. It has never caused me any physical grief, but the behavior modification from the psychological effect has ruined my life three times.