you have to know your body and its limitations. as you get older you will hurt random parts of your body in the stupidest ways. the other day i sprained a tendon in my hand from squeezing a bottle of ketchup. its just part of getting old and yes it sucks.
i also threw out my back landscaping when i was 21 and never been quite the same but you grow to manage it and avoid triggering it like being careful when bending pver and picking up stuff. never underestimate the power of R&R to recover. i took two weeks off cause i was bedridden and felt almost good as new