Practice Fueling
You put in hours of running each week to gradually increase your muscular and cardiorespiratory endurance while you train for a long-distance race. Additionally, you must train your gut in addition to your legs to prepare for those long runs.
The benefits of sports nutrition are multifaceted and include improved performance, reduced recovery time, reduced muscle soreness, etc. Newer athletes frequently neglect to refuel throughout training but attempt to use a sports drink or gel during their first long race. And the result is that running causes stomach cramps because the stomach has never had to process fuel under such stress. Luckily, this is an easy problem to solve: During exercise, practice your fueling strategy. This will help in training your stomach how to process fuel in situations where there is less blood flow to the digestive system and there is movement from running.