As a personal trainer, I emphasize the role of caffeine in enhancing workout performance. Caffeine, found in coffee, tea, or supplements, boosts energy, improves focus, and reduces perceived effort during exercise. It stimulates the central nervous system, increasing alertness and delaying fatigue, which allows you to train harder and longer. Studies show caffeine can enhance endurance, strength, and fat oxidation, supporting your fitness goals. A moderate intake of 3-6 mg per kg of body weight, consumed 30-60 minutes before exercise, is generally effective and safe for most people. Always stay hydrated and consult a professional to ensure it fits your diet and health needs.