How do you stay (somewhat) healthy?
modeless: I've never been big on exercising for the sake of exercise, but I do regularly go to a rock climbing gym.  It's good exercise, but more importantly it's fun, unlike lifting weights.  It requires the use of your brain:  a good climb is like a puzzle you solve with your whole body.  Great way to meet people, too.The only concern for hackers would be strain on the wrists.  If you have wrist problems climbing probably isn't for you, but personally I feel like climbing has strengthened my wrists and actually been beneficial.