IMHO, it's all how you train & take care of yourself. I'm 41, & my knees, elbows & shoulders are in better shape than ever.
I've had both knees scoped for meniscus tears (Plyos, & weighted lunges after 400lb smith machine squats). I've had issues with my elbows due to overuse, & rotator hurts to both shoulders. All while in my 20's & 30's.
I'm stronger than ever, but not even close to being topped out. Still making weekly gains, after finally getting busy with it.
Basically, I warmup thoroughly, emphasize form, & take time off when my body says I need it. It's amazing what 2 or 3 extra days rest can do for you sometimes. I do specific rotator work every week, & it's really paying off.
It's taken me 25 years of training to start to get it right, but it's working. Props to all the great contributers on the boards who help us all out, & make us feel young!
