at 52 i stopped all wheat/sugar and went completely paleo/keto/ wheat belly book diet.
kept my carb intake 50 or under per day and worked out like a maniac.
i started at 220 pounds, could not see my toes, and took heartburn meds daily .
i hurt my self at the gym at 54 yrs old and stopped working out.
i was 140 pounds and could do 200 pushups a day, 50 at a time, amazing amount of pullups and chinups, more than i used to do in basic.
unfortunately, i lost control of my fingers, probably a pinched nerve and completly stopped working out.
I plan on resuming this yr - I believe Jack La Lane kept working out until he was ninety - I'm sure any of us can get bigger muscles at 60 or seventy ys old