Also stretching. Or yoga, but stretching is easy.

Literally the thing that is best for all this shit is just stretching your muscles. I stretch every night before I sleep and I'm over 40, not feeling weird back pain that late 20 years olds complain about.

People act like you hit a certain age and your whole body starts to ache and you sleep worse. No, that's the sum of bad choices. Shit, I made bad choices but then I made good ones and now I'm fine.