Ken Hutchins of Renaissance Exercise makes a good point about that study about the incredible old triathletes .
I had not thought of that when I saw the study but logically he is right. There may be survivor bias going on. Those still training at 70 are those that have survived....how many have not managed to make it that far through injury or whatever? What can we really conclude from that study?
"There are amazing CAT scans contrasting the muscularity of triathletic and sedentary elder men. It is apparent that destroying your body in a triathlon can, at least, maintain your muscularity. Or, perhaps the difference is completely due to a genetic aberration whereby the above-average muscularity of the elder man merely enables him to destroy his body in the triathlon. Of course, it is also true that such activities are sarcopenic. "
I had not thought of that when I saw the study but logically he is right. There may be survivor bias going on. Those still training at 70 are those that have survived....how many have not managed to make it that far through injury or whatever? What can we really conclude from that study?

Comments
To some HIT people, anybody doing mainstream peer reviewed research is a fraud, and only they have it all figured out. Strength training is important and needed as we age especially, but a little humility is called for. No one has all the answers yet, but to write off all studies as fraud or incompetence is simply dishonest or delusional.
Did I agree or was I pointing out that logically he may have a point?
Good grief
Perhaps there is.
Plus, Ken wouldn't have said anything if the leg in question was of, oh, Clarence Bass.
Nobody disputes that weight bearing exercise of any kind be it "chronic" or not maintains and/or increases muscle mass with relation to the opposite which is sedentary, great genetics or not.