Indeed - and I would argue that despite that a lot of comments here and elsewhere anecdotally say that physical exercise helps to prevent signs of aging, some of these people who spend their entire time doing hard physical work do not look younger or healthier. They often look like they've lived pretty hard lives with really battered looking complexions and wrinkles etc - they almost certainly do NOT look "youthful" or "young for their age" - the opposite in fact, at least in my experience.

We in this industry live in quite a bubble in many ways. One of them is we get to chose when we go outside and exercise (mostly), but if you're a builder or a farmer or whatever you are usaully out there doing things, rain or shine.

Adequate rest is quite important to prevent the kind of injuries people in physical jobs get.