Consuming high amounts of caffeine before exercise can enhance performance by increasing energy and improving focus. However, excessive intake may lead to negative effects such as increased anxiety, dehydration, and disrupted sleep patterns. Caffeine can also cause gastrointestinal distress in some individuals. It's essential to find a balance that maximizes benefits while minimizing risks. Additionally, personal tolerance to caffeine varies, so individual experimentation and moderation are advisable for the best outcome.