Mood and healthy eating and sleeping are the most important. The elderly are most afraid of emotional influence, which easily leads to the sudden onset of various common diseases in the elderly. Try to have a light diet, otherwise it will easily lead to cardiovascular and cerebrovascular diseases, and the elderly are most likely to get this disease. Sleep is the guarantee of immunity.
As for sports, I guess I can't run in my eighties. The old people in the park have good sports equipment, which can massage the meridians.