Honestly something that’s worth looking into is building homes with habitat for humanity (or any other organizations doing the same thing).
It’s pretty strenuous exercise and is good for you. Make sure to not abuse your body however and learn how to avoid doing so (i.e keeping back straight and squatting instead of bending over).
The most important aspect is learning carpentry, which is extremely good knowledge to have. It’s not just learning a new skill and an option for a new career but its the money it saves you. A carpenter is a jack of all trades and is far from just framing 2x4s. You learn a little plumbing, some electrician work, framing, finishing and repairing drywall and some more.
Granted a lot of it is pretty surface level but for a lot of repairs and installs around the house it’s all you need. Instead of paying like 1000$ for someone go install a toilet, do it yourself. Install outlets and light switches yourself, build basic custom furniture and shelves yourself. You become very self sufficient and it can save you so much money.