Movement and cosmetic aging
It's been a while since I read it, but in Oliver Sack's Awakenings, he frequently mentions how young his patients looked. The book is about victims of encephalitis lethargica, and he reports on patients he tried to treat that were mostly confined and unable to move much, if at all. He says most of his patients looked much younger, even less than half their age despite being in the 50s & 60s. He tended to mention when describing individual patients, and I recall him saying that some were brought outside to nature or to get sun, so not necissarily just due to being locked up inside.
Which is what got me thinking, how does movement and living life in general contribute to cosmetic aging? Would someone that stayed indoors but exercised (say running on a threadmill) age more cosmetically than someone who did the same but didn't exercise?