The main purpose of a warm-up before exercising is to prepare the body for physical activity and reduce the risk of injury. A proper warm-up increases blood flow to muscles, elevates heart rate, and enhances flexibility and joint mobility. It often involves dynamic stretches and light aerobic activities to gradually raise body temperature. By doing so, the body transitions safely from a resting state to higher intensity exercise. This preparation not only enhances performance during workouts but also minimizes the likelihood of strains and sprains.