In the material, which activity is described as an aerobic option?

• A. Swimming
• B. Cycling
• C. Jump rope
• D. Running on a treadmill

Answer: (D)

Aerobic exercise is steady, rhythmic activity that uses large muscle groups and is performed at an intensity you can sustain with oxygen over several minutes. Running on a treadmill fits this definition well because it’s a continuous, rhythmic movement of the legs that you typically perform for a sustained period, tapping into the body’s oxygen-based energy systems. That sustained nature is what makes it clearly aerobic.

In the material, this activity is highlighted as the aerobic option, likely because of its emphasis on duration and steady pace. The other activities—swimming, cycling, and jump rope—can also be done at aerobic intensities, but the example given for the aerobic option is treadmill running, which exemplifies the continuous, oxygen-relying effort that defines aerobic exercise.