Which of the following is a protective factor against major chronic diseases?

Regular physical activity is recognized as a crucial protective factor against major chronic diseases such as heart disease, diabetes, and certain cancers. Engaging in regular physical activity helps to improve cardiovascular health, manage weight, enhance insulin sensitivity, and reduce stress levels. It also contributes to better overall physical fitness and mental well-being.

While regular weightlifting and participation in team sports can also provide significant health benefits and contribute to physical activity, the broadest definition of regular physical activity encompasses all forms of movement, including walking, swimming, cycling, and other exercises that promote cardiovascular fitness and muscle strength.

Eating fast food, on the other hand, is generally associated with negative health outcomes due to high levels of unhealthy fats, sugars, and sodium. Instead of being protective, fast food consumption can lead to weight gain and increase the risk of chronic diseases. Therefore, regular physical activity stands out as the most comprehensive protective factor among the choices provided.