At 72 I regularly get told I look in my 50s, but it wasn't until I started riding again this summer (after more than a decade of not commuting as I had in the past) from Covid spare time and started riding farther than I'd been commuting that I actually started feeling like 50s. Blood pressure, pulse are both better. I've lost a little weight, but a lot of bulk as stomach fat turned to leg muscle. My feet were starting to complain when I took walks, but that seems to have gone away, too. My wife is very vocal about her delight. Yea, biking!