The universe seems to smile on us who keep working, whether as employees or in our own business. Yes, it's a kind of voodoo, confirmed by research. I witness that phenomenon a lot, now that I am among the young aged. As long as we have to show up for work, we outsmart the worst of aging.
Take the corporate executive who was encouraged to take a package from a multinational corporation. He fell apart. Then he got the idea to study for his commercial driving license. At the transportation company, they loved him. Then he needed heart surgery. The medical doctor wouldn't give him the all clear for driving a commercial vehicle. Instead of transitioning to another kind of job, he stopped working. Today, he wanders around the house, annoying his wife and focusing on his aches and pains.
Another example is a woman who taught the unemployed aging basic computer skills. That's until she had to throw in the towel because of declining eyesight. Her children wring their hands about what to do about her now that she is losing her memory.
The lesson seems obvious: Don't give up working, If we can't continue to perform in one field, then find another.