Another way to be more optimistic about retirement is to set realistic goals for yourself. If you're a runner, you know that you can't run as fast as you used to when you get older. Father time always wins.
Speaking of winning, you can still try to win something. I try to win my age group - which I actually did in a race last fall. Here’s a picture of me holding my silly plaque from the Wheeling Day of the Dead 5K. Yes, not exactly the Olympics but at least I got some hardware.
So my time goals have changed...
...But that doesn't mean I can't still enjoy the sport as I get older. It's just different.