What are aerobic exercises?

• A. low-impact stretching only
• B. include rhythmic activities that use large muscle groups for an extended period
• C. involve short bursts of energy
• D. primarily flexibility movements

Answer: (B)

Aerobic exercise is sustained, rhythmic activity that uses large muscle groups and raises the heart rate over an extended period. The best description is activities that involve rhythmic movement of large muscle groups for a long time, like brisk walking, running, cycling, swimming, or dancing, which improve cardiovascular endurance and stamina.

The other ideas don’t fit aerobic training: stretching and flexibility work focus on range of motion and flexibility rather than keeping the heart rate elevated for a prolonged time; short bursts of energy point to anaerobic activities, such as sprints or heavy lifting, which are high-intensity but not sustained; and movements focused mainly on flexibility don’t provide the continuous, rhythmic, heart-rate-raising activity that defines aerobics.