Warming up before exercise serves multiple purposes, primarily to prepare the body for physical activity and reduce the risk of injury. A proper warm-up gradually increases heart rate, improves blood flow to muscles, and elevates body temperature, enhancing performance. Furthermore, a warm-up routine includes dynamic stretches that improve muscle elasticity and joint mobility, allowing for better range of motion during the workout. Engaging in a warm-up can also mentally prepare individuals for exercise, setting a positive tone for their workout session.