I worked at a building site for a year in a remote place. That was non-profit actually (I also didn't have to spend money for being there) - building a meditation center with friends, but it was great time of my life. I got healthy and had a change to just
think of some ideas without rush. I returned to the business with savings somewhat reduced , but with new energy to do stuff.
I think with some courage any physical job will do (edit: the one actually curing not worsening your health problems), because as hackers we learn to not give up and not be distracted by failures. Thus, I'd choose an occupation usually done in a nice healthy environment - like carpentry.
Of course, you will start from a zero level and will earn funny small amount of bucks. But I guess it's not the point (and you will probably don't need much, assuming you don't have a family dependent on you).
I really think physical working is so underrated. It builds your constitution slowly but in a way that cannot be achieved in a gym, because it happens in a natural way, not artificially.