Category: Endurance racing

An Ironman athlete can burn up to 11,000 calories during a single event, making nutrition the unofficial fourth discipline of the sport. Understanding what nutrition does Ironman use is critical for sustaining energy, preventing fatigue, and achieving peak performance.

According to sports dietitians, eating a large meal too close to a race is a common mistake that can lead to stomach upset and poor performance. The strategic timing and composition of your pre-race nutrition are critical to ensuring your body is adequately fueled without causing digestive issues during the event.