A wise man (or comedian) once said, once you turn 60, never trust a fart....
Several years as an automotive mechanic I got a lot of lower back aches and bad knees, comes with the job I suppose. I got out of the industry because the pay was crap and dermatitis was eventually horrendous on the back of my hands (oils and hand cleaner). I've been operating machines for around fifteen years now and provided I don't slouch in the seat my back is fine (with a little stretching). But my neck and shoulders ache from looking down in excavators and looking out of the back window in dozers, also my wrists from pulling levers all day. I still can't hold a squat for too long otherwise my knees don't like to straighten back out lol, all this going on for so long but I swear only much more noticeable since I turned 40 last year lol. My right wrist can sometimes flare up a bit while racing but I wouldn't give up on it because I enjoy it too much.