I am also approaching 76 in December. Lived here 14 years, was on the road as a pro musician for 40 years before that, which obviously meant plenty of not-so-good food, alcohol & cannabis, unusual sleep times (and partners!) Still love my burgers and chips, and beer, wine, voddy, but live carefully, with the Mrs, on Bht 40k per month as house and car are paid for. NO health insurance.
Never done any formal exercise in my life, in fact I ran home when it was supposed to be football practice on snow-covered field.
Go for annual check-ups and as such, nothing to show apart from slightly high BP, for which I take Amlodepine, and Doxadozin for slightly large prostate, 80ml, but PSA 0f 0.98.
I'm feelin' alright!