Hey Michael,
At 60 years old, I would recommend spending as much of your time as possible wandering around with your stick 'n string, fishing and as many other pleasurable hobbies that your body will allow. Leave the reading for when you get 'old'. Remember, 'A body at rest - stays at rest, while a body in motion - stays in motion'.
I spent too much time recently recovering from knee surgery sitting in my lazy boy chair and now I'm having a difficult time getting my 65 year old body back in motion. Seems the hills get higher and the forest gets deeper every year. Did get to spend quite a lot of time standing in the back yard flinging arrows. Close range shooting involving less walking to and from the target. All-in-all though, I too am grateful.
Be Well . . .