Which of the following is a benefit of cardiorespiratory exercise?

• A. Reduces risk of cardiovascular disease
• B. Increases blood pressure
• C. Suppresses immune function
• D. Worsens mood

Answer: (A)

Regular cardiorespiratory exercise strengthens the heart and circulatory system, which lowers the long-term risk of cardiovascular disease. It does this through several mechanisms: lowering resting blood pressure over time, improving the blood lipid profile (increasing protective HDL and reducing LDL and triglycerides), aiding in weight management, and improving insulin sensitivity. It also enhances endothelial function and reduces systemic inflammation, all of which protect the heart and blood vessels from disease. Because these broad, ongoing changes directly cut the chances of heart attack, stroke, and related conditions, reducing cardiovascular risk is the primary benefit.

In contrast, increasing blood pressure isn’t a goal of regular training; while blood pressure may spike during a workout, long-term training typically lowers resting blood pressure. Suppressing immune function isn’t a regular benefit of cardio—moderate, regular exercise can support immune health, though very intense or excessive training might transiently affect it. Worsening mood isn’t supported by evidence, since aerobic activity generally improves mood and energy levels.