What is the primary role of a warm-up before physical activity?

The primary role of a warm-up before physical activity is to prepare the body for exercise and reduce injury risk. Warming up gradually increases the heart rate, blood flow to the muscles, and body temperature, which helps improve muscle elasticity and make the joints more mobile. This physiological preparation is crucial because it allows the body to transition smoothly from a state of rest to one of physical exertion, reducing the chances of injuries such as strains or sprains.

Additionally, a proper warm-up stimulates the nervous system, enhancing motor unit recruitment and coordination, which can further support the body's readiness for more intense activity. While warm-ups can also lead to improved performance and incorporate stretching, their primary focus is on preparing the body safely for the workout ahead.