This idea that you simply have to keep fit and healthy and you will be able to work into old age makes me laugh. Or I could cry.
At 50 I was very fit and healthy, which was just as well because DH had to retire in his late 40s with a disability and we have two sons, one of whom is also disabled. The whole family depended on my earnings, plus DH’s small pension plus DLA.
From 50 onwards, my health deteriorated to the point that I developed multiple chronic conditions plus severe depression. But I had been so fit and healthy and sooo positive!
I am now retired, desperately ill, so is DH. Both of our DSs have jobs, but they cannot get enough hours or anything above minimum wage and so have to live with us. We will also have to look after elder DS, with ASD, until we die.
Luckily, we can manage on our pensions, but what will become of our sons?
Don’t assume that you are in control of how your body and mind will age.