physical changes and aging

Osteoarthritis between athletes and non athletes
What is osteoarthritis and how does it impact someone someone
Thesis will athletes suffer from osteoarthritis as they get older and are they more likely to get it before non athletes.

Main point 1: will athletes suffer from OA as they age
Main point 2: who is higher risk of OA athletes or non athletes

Apa style.

7 sources from google scholar or Pubmed