Answer: Increase the enjoyment of exercising
Explanation: No one likes doing the same thing over and over, it gets boring. You'll more than likely loose motivation and joy quickly if you stick to one exercise.
Answer:
Grinding mill china
Explanation:
My personal, tentative wild guess is: <em>apnea</em>
This is sometimes called knee valgus, valgus collapse, or some combination of the two.
