Of course. I am 50 and trust me when I say, 50 is a long way from 30 when it comes to recovery etc. I don't believe at all that fitness and age run in a linear plane so a guy running a marathon at 100 is alot different than 60 or 70. Not to take anything away from 70 year olds, but the fact that this guy is now the oldest human to have completed a marathon confirms what a remarkable feat it is.
correct. But "if" a person goes to the Aging clinics like Cengenics they can receive all sorts of supplements to help the aging athlete's muscle recovery be very close to that of a 30 y/o. (HGH, Testosterone etc.) Notice the rise of the pro riders in their late 30's competing BETTER than they did 10 yrs ago.
I am doubtful that any 100 y/o was able to run 26miles without some 'help'