Certified Personal Trainer (NSCA) Practice Exam 2026 – Complete Prep Guide

The correct answer, which focuses on aerobic activities like running or cycling, is appropriate because these types of exercises demand sustained effort from the cardiovascular system. They promote increased heart rate and improved blood flow, which enhances the efficiency of the heart, lungs, and the entire circulatory system. Engaging in these activities consistently develops the body's ability to utilize oxygen more effectively, leading to increased endurance over time.

Aerobic exercises involve prolonged physical activity performed at a moderate, consistent intensity, which is essential for building cardiovascular endurance, as they encourage the aerobic energy system to contribute primarily to energy production. This not only supports cardiovascular health but also improves stamina and performance in various sports and daily activities.

In contrast, weightlifting primarily engages the anaerobic systems and is focused more on muscle strength and hypertrophy rather than endurance. High-Intensity Interval Training (HIIT) does include a cardiovascular component, but it is usually more about alternating between intense bursts of activity and rest, which may not primarily target endurance improvements over long durations. Static stretching is aimed at increasing flexibility and has no significant impact on cardiovascular endurance.