The potential effects of caffeine on athletic performance depend on various factors like dosage and individual tolerance. Caffeine can enhance endurance by increasing focus, reaction time, and reducing the perception of effort during exercise. It may also promote fat oxidation, improving fuel utilization during workouts. However, excessive caffeine intake can lead to negative side effects such as jitters, insomnia, and gastrointestinal discomfort, which could hinder performance. Overall, moderate caffeine consumption can be a effective ergogenic aid for many athletes when timed appropriately around exercise sessions.