I took an hour walk today. I am usaully fairly sedentary and very out of shape. I did okay by my own standards. What would you do if you still could? If you don't use it you may lose it ... that's the popular saying anyway! You can lose a lot of things in life ... jobs, loved ones, abilities like walking or sight. I have the most general of living wills. Its hard to define those particular limits. At this point in my life I say that as long as I was able to work a T.V. remote, play video games, read a book and surf the internet life would still be worth living. I have never been a "goer". My most pleasurable moments are typically spent in my own company with only my own thoughts to ponder. My life so far has been an interior one.
The unexamined life is not worth living. If you are not learning you are not really living your life.