Alternatively, you can eliminate the underlying causes and enjoy life even more...
For example, regular cardio can improve SO2 level in the blood, which directly impacts performance.
Weightlifting, especially with older gentlemen, can significantly boost testosterone levels.
Lower body fat can also dramatically improve testosterone levels (related to the two items above)
Reducing estrogens in the body will also have impact. If you drink a lot of beer, either look to quit or at least look at drinking spirits instead.
Watch the amount of food you eat with phytoestrogens. Soy, obviously. But there are others.
If you have diabetes or pre-diabetes, get the sugar levels under control.
Watch your stress levels. Adrenal fatigue and excess cortisol in your body does a number on a lot of body systems, including your “drive.”
I don’t suggest that this will with for a 75, 80, or 85 year old who wants to engage in some “horizontal aerobics” at the performance level of a 21-year old.
But some simple lifestyle changes made a huge difference for this 60 year old.
“Horizontal aerobics” sounds as though it should be an Olympic event