Caffeine can enhance physical performance by improving focus, increasing endurance, and reducing perceived exertion during exercise. It stimulates the central nervous system, potentially resulting in improved reaction time and overall workout intensity. Caffeine may also enhance fat oxidation, promoting better energy efficiency during endurance activities. However, individual responses can vary, and excessive intake may lead to negative side effects, including jitteriness or elevated heart rate. For many athletes, moderate caffeine consumption before workouts can provide beneficial effects, enhancing performance and exercise experience.