What role does a warm-up play before physical activity?

A warm-up serves a critical function in preparing the body for physical activity, which includes both physical and mental preparation. The primary role of a warm-up is to gradually increase heart rate and blood flow to muscles, raising their temperature and making them more pliable. This physiological change helps improve muscle elasticity and joint mobility, which can significantly reduce the risk of injuries such as strains or sprains when engaging in more intense physical activities.

Additionally, warming up can include mental preparation, helping athletes focus and set their minds for the upcoming physical demands. This combination of physical readiness and mental alertness enhances overall performance and reduces the likelihood of accidents or injuries during exercise or competition.

The focus on this dual preparation is why the option that emphasizes both mental and physical readiness, as well as injury risk reduction, stands out as the most accurate answer. Other choices may address specific benefits of warming up but do not encompass the full range of advantages it provides.