I'm losing my will to train.
I've been at it for 10 years now, since high school, and I have managed to go from 140lbs to 200 lbs at 6'3", but I always end up back at 170-180 (and not lean). I bust my ass and train hard and the progress comes, but I can't keep it up because of joint pain.
I've dealt with knee tendinitis that was bad enough that I couldn't walk up stairs without the hand rail, and I have to stop lifting heavy a few times a year because my shoulders/elbows/wrists hurt when I push open a door.
Lyme's disease has been ruled out, and a few doctors have told me it's just how I'm built. My frame is small enough that even at 180, people notice I lift. I get comments that it looks like I was supposed to be shorter, like my body is stretched out. Maybe relevant: I've always excelled at sports despite being pretty weak (could barely bench 135 in high school) because I could, for instance, hit and throw a baseball harder than anyone on my team. I'm guessing it could be indicative of a tenon issue?
Could there be a systemic issue that I could fix? Some deficiency or something? I spend too much time to have no progress, and the injuries keep piling up.