If a person's goal is to increase his or her overall fitness, which is the most important factor: the specific aerobic exercise a person does or the intensity of the exercise? defend your response. < < read less

Intensity is more important when it comes to improving physical fitness. Maintaining it at a certain level would keep the physical prowess at a standstill, which is also not a bad thing depending on what a person wants. If one however wishes to increase his abilities then increasing intensity is necessary. Of course, it should happen gradually, not all at once, since that could result in serious injury. 

Ibelieve this would be an obstacle.

Keeps you from getting lung cancer from smoking