My father noticed the same thing and feared it would happen to him, so he kept working part time after retirement. When he finally retired completely, he died

My father noticed the same thing and feared it would happen to him, so he kept working part time after retirement. When he finally retired completely, he died within a few years at a healthy (other than sudden cancer) age of 74. I’ve suspected there is something about the pressure of work that “holds” us together, though I can’t put my finger on it.