Aerobic fitness: 12-minute run or 1-mile walk
How fast you can run a mile and the number of push-ups you can crank out aren’t just good for fitness bragging rights. They’re indicators of how well you’re aging
https://www.wsj.com/health/wellness/fitness-age-cardio-strength-balance-c5a7c1ad?st=j84omn031bc4agg
Gypsy Marathon 