Grumpy Warning = ON
Ok, there's a whole mindset "out there" permeating our world that demands that fitness only be viewed through the lens of incresed lifespan. The sited report seems to fall into that category and seems to use lazy logic to make the point. For my part, I believe I stay at my level of fittness because I was ALREADY given a level of good health and physical "sturdiness" just by the throw of the genetic dice. It allows me to go out and "just do it".
I once did a career in the medical business, for my sins, and one of the ideas that got tossed around was that good fitness "delayed and compressed the Period of Morbidity". Which I took to mean, fit folk stay healthy longer and the thing that finally kills them doesn't take as long. Not such a bad deal.
I'm personally not all that keen to live a life beyond the point I can do stuff. And incarceration in the clutches of the medical "care" establishment? Forget that.
Grumpy Warning = OFF