Caffeine plays a significant role in exercise performance by acting as a stimulant that enhances physical endurance and cognitive function. It can increase the availability of fatty acids for energy, potentially improving performance during prolonged, intense activities. Caffeine consumption has been associated with reduced perceived exertion, allowing athletes to push their limits. Furthermore, pre-exercise caffeine intake can improve focus and alertness. However, moderation is essential, as excessive consumption can lead to negative side effects, such as jitters or digestive discomfort.