I used to roller-blade, but hurt my back. Then I got into swimming because it helped my back, and eventually gave up roller-blading as my bones get stiffer as I get older.
As it turned out, I'm really good at swimming and was even training with the Aussie Masters team (like Olympics for old people) at one point, but I never wanted to compete. Qualified as a swim teacher not long ago, just to add to my skillset and options. However, hacking arcade cabs and electronics are proving to be more than enough to keep me busy.
Next month the weather will be good enough to get into the pool regularly again, which will make my pooh-bear tummy a little tighter and me happier. Which makes now a great time to be finishing off that vertical cab and getting back to my Aussie lowboy. I have the raw shell done in 3/4 inch plywood, metal control panel blank cut and CRT mounted, but project has been idle about 2 years.