I don't know, my grandfather now pasted away in his 70s could run a mile faster than me back in my teens and I could run the mile in just under 5 minutes. We

I don't know, my grandfather now pasted away in his 70s could run a mile faster than me back in my teens and I could run the mile in just under 5 minutes. We used to race at the track. He lived until he was 91. The reality is you can be pretty active and enjoy life well into your 80s but it only takes one thing to go wrong at that age for pretty much everything to stop. He has a stomach issue where is large intestine just burst... this by itself does not kill someone today - medicine is very good, but eventually it's the lack of nutrients and the body just takes forever to heal itself that eventually will catch up to all of us... The most promising thing I've read about with this regard is the gdf11 discovery by the scientists at Harvard - but like any discovery... there's a lot probably missing from it... at any rate, exercising is without a doubt a good thing, but eventually our bodies will just fall apart... literally.