It would be to value your health. Use it. Take care of it. Thank whatever deity you may believe in for it. Because once it is gone....it's like air- you don't notice how much you need it until you can't breathe. Or your knees...you miss them when they're gone. I hope nothing happens to my knees....
Sadly, this is something that I only realised once my health was taken from me. I sit now, barely able to type because my hands are in bandages due to chronic eczema. BIH and diabetes has robbed my of my youth. I can't have kids because it's too dangerous and nothing works properly anyway. And mental illness has robbed me of...everything.
I remember the days when I could still run and climb trees and when I took no pills. They seem incredibly far away.
So, yes value your health. It is one of life's greatest gifts.