I was working full-time in central London until I was 62. Yes, I know that is a "youngster" for some, but it was also taking 3 hours a day to travel there and back each day for the last 16 years of my working life, even though I am only 25 miles from the City because of the appalling, slow and unreliable train and tube service.
I've been retired for nearly 5 years now and, in relative terms, have slowed down a lot. Some days I am full of energy and garden, shop, sew, clean and cook all day. I have full days of childcare or after school childcare at least twice a week. Other days I do nothing much except sew and browse the internet (including Gransnet!) I can live with that, it's my time now and I don't feel at all guilty having worked since I was 16.
My mum was a whirlwind until she was in her late 80s when she became very ill. She was always up early and "doing" until she went to bed. No-one gave her a medal!
Each to their own...