Consuming too much caffeine before workouts can lead to increased heart rate, anxiety, and dehydration. These effects may hinder rather than enhance performance, as excessive caffeine can produce jitters, impair focus, and increase the risk of gastrointestinal distress. Furthermore, reliance on caffeine for energy can mask fatigue, potentially encouraging overtraining and increasing the risk of injury. Moderation is key; lightweight options or low-caffeine alternatives can help prevent these negative outcomes while still providing performance benefits.