I move around a lot and I can't count on having a swimming pool anywhere near me, and I don't really want to spend time commuting to my exercise location.
Biking strenuously while staying safe and not stressed seems to require getting out of the city. I do enjoy stationary bikes, but I generally loathe gyms (too many TVs, bad music, expensive, etc) and again, I move too much to have my own gear.
I don't like running because it's painful and boring. I don't like yoga because it seems to require subtle understanding to avoid doing things wrong, and all the videos I've seen go too fast, or are annoying in some other way.
I suspect I would enjoy lifting, but again I need a gym, and where I'm now I don't have any friends who can teach me.
Getting exhausted by doing physical labor that actually has a point is my favorite kind of exercise, but that doesn't come around often for me.