explain how regular participation in physical activity can increase life expectancy.

Answer:

Regular physical activity can increase life - expectancy through multiple mechanisms. It improves cardiovascular health by strengthening the heart muscle, reducing blood pressure, and improving cholesterol levels, thus lowering the risk of heart disease. It also helps in maintaining a healthy weight, reducing the risk of obesity - related diseases like type 2 diabetes. Physical activity boosts the immune system, making the body more resistant to infections. Additionally, it can improve mental health by reducing stress, anxiety, and depression, which are also factors that can impact overall health and longevity.

Brief Explanations:

Cardiovascular, weight, immune, and mental - health benefits contribute to longer life.