I think it's more likely that he is dead, because life extension tech is not yet sufficiently advanced to support someone of that age.
You need to start implementing it fairly early in the human lifecycle for it to have any substantial effect.
I also think the idea is doooomed.
Incidentally we already have a lot of the answers, and its not secret science.
Take a look at some of the body builders aged 70.
The only thing "wrong" is that it is not a magic pill, but hard work and dedication.
I'm 50-ish years old, but I've been fitter and healthier than the typical average 21 yr old - despite chain smoking and other habits.
People want a Magic Pill.