My training partner is 17 years younger than I am and I routinely out train him.
We even did a workout once of box squats same percent of max, followed by good mornings, reverse hyperextensions, and pull thrus. He actually had to have me carry both our gym bags out and hold onto my shoulder on the way out. I frequently out train the other guys.
One problem they have is some work ethic, but another is myth of overtraining. Look powerlifters and olympic lifters used to work hard, physically demanding jobs, and still train hard. They made great gains. Most of us now sit in offices, and do not do that much else.
With the deaths I see in powerlifting and body building lately I firmly believe one cause is the over consumption of food and drugs and lack of training and a life to go with it.