I think the answer is intensity
I believe it would be unrealistic goals, because then you would be pushing yourself harder when your body shouldnt be working that hard.
Answer:
Option B
Explanation:
The factor of stability may be applied to either the behavior itself or to the situation in which it has occurred.
Those two are the muscular system and the excretory system because you use your muscles to push up and down and your excretory system produces the sweat you use while doing them
