Endocrinologists is the specialist doctor you should go see
Answer:
Working out in a gym
Explanation:
This is the only activity that could actually be healthy.
You didn't really provide us with any options? It must be noted that generally, the structure of the skeletal system also dictates its function. With that I mean that having bones and a skeletal system enables us to move more efficiently and to have the pose which we have.
Go to bib me or sum and copy and paste the url into the little box and it will give you the bib