I spent the 90's working out in commercial gyms. Going to failure on most sets. crazy programs I found in magazines. I got hurt a lot, and I got sick a lot. I may have been strong but I was not healthy.
Now I approach training as practice, I avoid overtraining, I'm not as strong as I once was, but I seldom ever get sick.
I was in Okinawa Japan Ten years ago, and I watch a number of elderly men in their 80's still performing karate.
They were obviously shadows of their younger selves but compared to most 80 year olds of today, they were physically and mentally doing fantastic! Movement and strength is the fountain of youth, physically and mentally.
I'm fifty now, but I know in thirty years, I'll still be lifting KBs and doing karate.
Al