Unless there’s a way to extend or repair the telomeres at the end of our chromosomes. The cure for aging seems to be a far fetched idea. Though repairing and/or extending telomeres only extend the clock.
That's my understanding as well... that the current indications are that telomeres are the key to the aging process.
I will put it plainly then: slow aging? completely freeze it? reverse it back to an optimal state and then freeze it?
In a philosophical sense, I guess you can't really "stop" aging anymore than you can stop time, because no matter what measures you take, time will continue to pass, so your cells will continue to technically get older in time, regardless of what changes they experience. So in that sense there is no way to stop "aging"... but I think what you are really talking about is not "aging" specifically, which as I've said happens unavoidably with the passage of time... what you are really talking about is the
degradation effects that happen over the course of time... the "effects of aging".
Now with athletes, they obviously will often have healthier diets and more active lifestyles, which combats aging, but then they can also put exponentially more stress and strain on their bodies, so there is more "wear and tear". I can't quantify what the balance is as it obviously varies based on the person, activity etc., but it is a factor that can't be ignored. I'm reminded of a Harrison Ford quote in
Raiders of the Lost Ark... "It's not the years honey... its the mileage".
So our bodies age in time, use, and degradation. Time is impossible to reverse, by its very nature. Use is within our control, to some extent as is degradation, probably to a lesser extent. One way I can see as a means to counteract both use and degradation simultaneously, is through cloning/transplants... but of course that raises all kinds of ethical concerns. The movie
The Island, gives an extreme example of this.