What effect does increasing physical activity have on heart health?

Increasing physical activity has a well-documented positive effect on heart health. Engaging in regular exercise is known to reduce the risk of developing heart disease by improving various risk factors such as high blood pressure, cholesterol levels, and body weight. Additionally, physical activity enhances heart function by strengthening the heart muscle, improving circulation, and promoting better oxygen delivery throughout the body.

Exercise also positively influences the body's metabolism and can help manage stress and inflammation, both of which are beneficial for cardiovascular health. As the heart becomes more efficient at pumping blood, overall cardiovascular fitness improves, contributing to a reduced likelihood of heart-related issues in the future.

The other options do not accurately reflect the benefits of increased physical activity. For example, suggesting that increased activity might increase the risk of heart attacks contradicts numerous studies indicating that regular exercise decreases such risks. Claiming that there is no effect on cardiovascular fitness overlooks the established benefits of physical activity, and implying that exercise alone can cure existing cardiovascular conditions fails to recognize the need for comprehensive management of such diseases, including lifestyle change, medication, and sometimes surgical interventions.