Although I can workout with the best of them, there is something I do now that I did not do as a young man. I take a nap, muscle sleep, for half an hour every afternoon.
This not only helps recuperation but it is a great energizer. Actually, more bodybuilders than you may imagine, especially the pros, who can afford the time, make a habit of taking a short mid-afternoon nap.
As an older person, you may want to adopt this habit of taking naps.
Sleep experiments, incidentally, have shown that two or three short naps are more beneficial than one long sleep. The way most of our lives are organized, taking a nap every few hours is not practical, but it is an interesting scientific observation nevertheless.