I trained for a marathon. I developed plantar fasciitis. I had to stop.
I did nothing for about 2 years. I grew fat and out of shape.
I then took up MTBing to bond with my teenage son. I almost killed myself on several occasions. I don't recommend it to newbies.
I then bought a road bike. I liked it because I didn't have to worry about jumping over stuff or running into trees and very large rocks.
I think riding gives me something to look forward to. I love to be outside, except when it is 20 (which it was today when I rode. Maybe more on that later).
It's not been transformative. It is fun, though. My wife doesn't like it much. After 30 years of marriage I'm not about to dump her so I can ride more.
I think that's it.