Not just weight. It’s lack of exercise. I’m 41 and my knees and back are fine even after a stint in the army. Gotta keep using those muscles and joints if you want to use them when you’re older.
I'm at the stage where if I sit around too much it starts to hurt, but if I make healthy choices and exercise everything is still fine. It's like my body requires healthy choices. Wasn't like that before.
I asked my oem if I could get replacement parts. Needless to say my mom said my model wasn’t getting built anymore and to not treat things like I stole it.
I hesitate to say this out loud, but mid-50s and nothing hurts yet, except the migraines I've gotten since teenage years.
Knees last if you take care of them. Back lasts if you take care of it and are lucky, and don't get fat, and are lucky, and don't work a physical job, and are lucky.