Which statement accurately describes aerobic exercise?

• A. It primarily builds muscle
• B. It improves cardiovascular endurance
• C. It is suited for high-intensity intervals
• D. It requires minimal oxygen

Answer: (B)

Aerobic exercise is characterized by its ability to improve cardiovascular endurance, which involves the efficient functioning of the heart, lungs, and blood vessels during prolonged physical activity. This form of exercise typically engages large muscle groups and is performed at a moderate level of intensity over an extended duration, allowing the body to use oxygen to generate energy.

Activities such as running, cycling, swimming, and brisk walking exemplify aerobic exercises where the body relies heavily on oxygen to sustain effort for longer periods. The enhancement of cardiovascular endurance through aerobic exercise not only helps increase stamina but also supports overall health by reducing risks associated with heart disease, obesity, and other chronic conditions.

While muscle building and high-intensity training may involve various exercise modalities, they are more aligned with anaerobic exercise, which focuses on short bursts of activity requiring greater energy output and less reliance on oxygen, often leading to muscle hypertrophy rather than endurance.