What is the effect of a high carbohydrate diet prior to an endurance event?

A high carbohydrate diet prior to an endurance event enhances performance by maximizing glycogen stores. Carbohydrates are the primary fuel source used during prolonged, aerobic activities such as running, cycling, and swimming. When athletes consume a diet rich in carbohydrates, their bodies can store more glycogen in the muscles and liver.

In endurance sports, having adequate glycogen stores is crucial because it allows for sustained energy release over time. Depleted glycogen levels can lead to fatigue and a decline in performance, commonly referred to as "hitting the wall." By ensuring that athletes have maximized their glycogen reserves through a high carbohydrate intake leading up to the event, they are better prepared to perform at their optimal levels.

This strategy based on carbohydrate loading is well-supported by sports nutrition research and is widely adopted by athletes to enhance their endurance performance. Consequently, a high carbohydrate diet serves as a significant contributor to success in endurance events.