TL;DR: Gained too much weight after I fell and broke my arm + couldn’t really move for a while. I have a lot of trauma related to sports, like I was forced to play football like any other Hungarian kid, and I was awful at it, which made others be angry at me for it, which made me reluctant to do it. Even if I manage to do it, I often get brutal, crippling muscle pain, which makes me fo it even less.
Since I"m Hungarian, I cannot rely on health care at all, especially mental health, as it was the very first thing that got cut, amd I cannot afford private care.
Did you ever watch Dragonball Z? All the scenes where Goku or Gohan are training to get stronger, building their bodies to be powerful? Piccolo wearing insanely heavy gear to improve his speed?
You don’t need to do sports to train your body. You are giving your body the opportunity to learn how to be strong, to learn endurance. You can’t do that without practicing those things, using your strength, pushing your endurance.
That said, I have found working with kids to be very helpful. I work with a particular young kid who absolutely loves being lifted and thrown about. I use him as my weight training and it is a whole lot of fun, not to mention rewarding making his day more fun. Maybe there is something you can find that is similar?