Caffeine can have a positive impact on physical performance by acting as a stimulant. It enhances endurance, reduces perceived exertion, and can improve focus during workouts. Caffeine increases the release of epinephrine, which prepares the body for intense physical activity, leading to better performance in endurance sports like running or cycling. Research suggests that caffeine may also enhance muscle contractions and promote fat oxidation, increasing overall workout efficiency. However, it is essential to consume it in moderation, as excessive intake can lead to negative side effects, including jitteriness or dehydration.