The body’s circadian rhythm significantly affects exercise performance, influencing aspects such as strength and endurance. This internal clock regulates sleep-wake cycles, hormone levels, and core body temperature, all of which can impact physical activity. Many individuals experience peak performance in the afternoon or early evening when body temperature and hormone levels, such as testosterone, are optimal. Exercising in sync with the body's natural rhythms can enhance both physical capacity and mental focus. Conversely, workouts during off-peak times may lead to diminished performance and increased fatigue.