One way exercise helps reduce risk of cardiovascular disease

• A. Builds muscle mass
• B. Increases endurance
• C. Keeps lungs healthy
• D. Strengthens bones

Answer: (D)

Regular aerobic exercise makes the heart more efficient at pumping blood and improves circulation. This leads to lower resting blood pressure, better cholesterol and insulin sensitivity, and healthier body weight—factors that collectively lower cardiovascular disease risk. Increasing endurance best captures this effect, because it shows the body's improved capacity to sustain activity and support heart health over time. Building muscle, keeping lungs healthy, and strengthening bones are important for overall health, but they don’t target the heart’s cardiovascular efficiency as directly as improved endurance.