Bentley has gotten a lot of confusing advice about exercise. He hears that he needs to really push himself to get the most out of it. He has also heard that he should slow down whenever there is pain or discomfort. How can Bentley BEST strike this balance?
A.
There should be absolutely no discomfort in exercise.
B.
If he is not in pain then he is definitely not building muscle.
C.
Pain is just part of exercise and he should just accept it.
D.
He should push himself to some discomfort but not actual pain.