The specific aerobic exercise is the most important factor if a person's goal is to increase his or her overall fitness. Aerobic exercises means "with oxygen" which will increase your heart rate while working out. Some of the specific aerobic exercises include brisk walking, swimming, running, also known as cardio workouts.
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Hi Belle, I think it would be Intensity because the beats per minute are increasing. So that means that she/he is going faster. I hope this helped!!!