I lifted very heavy when I was in my late 30s and early 40s. Even after it damaged me, I wouldn't give it up. I did some crazy things like load up the leg press machine with as many 45 lb plates as it would hold then had my GF sit on the top. Also, three of us were trying to become the first to bench press 200 lbs with dumbbells (100 lbs in each hand). I got to 95 but no further. I became very competitive with the guys in the gym to the point that I had completely lost sight of my original goals much to my detriment. I was warned that I would pay for my heavy lifting as I got older.
Today, I'm nearing 70 and it's all come back to haunt me with aches and pains -- torn biceps, left hip, neck, right ankle, chronic pain in my right shoulder and the left shoulder is worse (ball & socket damage, stretched ligaments, floating bone chips, possible rotator cuff damage, osteoarthritis). Oddly, my knees are just about the only major joints with no issues. Let my weightlifting life be a warning to others.