I had similar reconnaissance but now I hesitate to share. But challenge accepted, worst case is downvotes :) 4 years back, maybe 5 I used to think this is how old age was (would not mention my age but it is younger than the main OP), body slowly unable to do what is used to be able to do. Then after 2 stents and change in lifestyle, I find I can do same or more than what I could do 5 years back, maybe a decade back. Will it continue like this for next decade, or the decade after that? Who knows? But there are many things within the that are in the range of probability and it is on us to push towards the higher end of the range. For those who start disciplined, it may not make much of a difference, but think of an average person ... I think programming at 70 should be feasible for most as long as they fixed their lifestyle by 50. [Most but not all because this is a game of odds]
What kind of change in lifestyle made such a positive difference for you?
The bad side effects: focus. There are times when you are in the zone and you want to finish some piece of work, and the watch tells you to get up because it is 50 minutes after the hour. 2 very conflicting needs: moving for health vs sit and focus. If I was not overthinking of health, I would rather focus and get the job done in one sitting.
Lockdown has given me a couple of months of sitting in one place. I've really enjoyed the focus and productivity, and online conferences I couldn't have attended otherwise.
But my usual exercise is to walk around town extensively, and to pace a lot while thinking. Not much of that happening while confined to a small space.
Like in politics, there are different camps in terms of nutrition and DIY well being. You follow what works for you, but the best in terms of "pitch" I liked was Dean Ornish and he wants you to focus on a) diet, b) exercise, c) meditation, and d) social connections. All of that is needed, and all of that helps.
Uh, vegies are mostly carbs?
> Not OP and not in their age group
Then why are you answering?