This reminds me of what Sting did - he ran 6-7 miles per day and thought that was the only way to keep in shape. Then he switched to Yoga and became a poster child.
https://www.whitelotus.org/interviews/ganga-speaks-sting-about-yoga-his-life
"All those years of running must have taken their toll. I’m told that stiffness in the gluteus is about stubbornness--bloody-mindedness. So I’m working on that! You know, the intention, the long term goal, is to become completely fluid, completely liquid and sinuous. As I get older I’d like to be that. I’d like to have explored the entire range of my body’s abilities. It’s not that I am afraid of getting old. I just want to get old in a certain way."
"I hope my legs don't break - Walking on the Moon - We could walk forever - Walking on the Moon"