I get where you're coming from
Even nowadays, for most people once they reach 80/85 (for many around 75/78) even with their marbles intact, most will have some sort of mobility issues - I say most, there are exceptions - or their worlds will have 'shrunk' in the sense that they just don't fancy doing lots of things or venturing that far. So likely most active between, say, 65-75.
My parents-in-laws are bright and fun and do cruises from Southampton a couple of times per year and that suits them as MIL (83) has mobility issues and FIL is starting to get dizzy and tires easily (85). Up until they were 75, they were travelling and out all the time, more than we were but it's definitely tapered off as it does for most, I think.
My Mum was active and did lots of walking until around 78, after that she still managed walking to the shops etc but this has also tapered off since she was 83 (had a fall - think for women falls are more common).
So the 'health span' (as opposed to 'life span) would suggest do the things you love now, i.e. before you are retired and then maximise travel, spending when fully retired because you're unlikely to do all of this throughout your 'life span'.