What is one potential side effect of excessive caffeine intake for athletes?

Excessive caffeine intake can lead to an increased risk of dehydration, particularly in athletes. Caffeine is a stimulant and a mild diuretic, which means it increases urine production. When athletes consume high amounts of caffeine, this can lead to greater fluid loss through urination, especially if they do not adequately replenish fluids lost during exercise. This is particularly concerning for athletes who need to maintain optimal hydration levels to perform at their best.

While caffeine can have benefits such as improved focus and potentially enhanced athletic performance, the risk of dehydration can outweigh those benefits, particularly in endurance sports where hydration is crucial to maintain performance and prevent heat-related illnesses.