The primary purpose of a warm-up before exercise is to prepare the body for physical activity. It gradually increases heart rate, blood flow, and muscle temperature, which enhances joint mobility and reduces the risk of injury. A warm-up typically includes dynamic stretches and low-intensity movements that mimic the upcoming activity. This process also aids in mental preparedness, helping athletes focus and transition into a workout. Ensuring an effective warm-up can significantly improve performance and minimize soreness following exercise.