The funny thing is that the stress from jumping all these hoops might actually age him faster. I think I read that lowered stress leads to slower aging. Then there's just basic stuff like eating better and exercising more, but not exercising too much.
I read an article by a tai chi teacher who's in his 70's and he doesn't have health problems and said it was due to him doing Tai Chi almost daily, while eating a whole food plant based diet that's low on meat and dairy.
On a similar note, my 12 year old dog overcame a bout of severe pancreatitis and had to be put on a prescription diet, but lost 3 pounds (a little over 10% of her body weight) and is getting walked more often and it feels like she's a much younger dog now. She walks quickly now and with more agility. She can jump better and has tons of energy, and she's more alert and noticeably thinner and healthier looking.
Given how obese and sedentary many Americans (and citizens of similar western nations) are a lot can be done with lifespan and healthspan just by making a few simple changes. Like eating / activity level and also lowered stress and more sleep and hydration.
Of course the REAL root of a lot of our problems is poor work/life balance due to increasing oligarchy, but there are still things we can do, like trying to do a little bit better than we did yesterday, and also fighting the oligarchy.