Answer: D) Intensity
Explanation:
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Resource is from the QuestionAI analysis,
- Time (Duration): This refers to the length of the exercise session. Aerobic exercises need a certain duration to effectively engage the cardiovascular system.
- Repetition: While repetition is important for muscle endurance, it may not be the primary factor for increasing aerobic fitness.
- Frequency: This relates to how often one engages in aerobic exercise. A higher frequency can contribute to improved aerobic fitness.
- Intensity: Aerobic exercises are most effective when performed at a moderate to high intensity, as this challenges the cardiovascular system and promotes improvement.
