As a software developer, I’m at my computer for extended periods during the weekday. All knowledge workers should be aware of the problems that can be associated with extended periods of time staring at computer screens while seated. Ergonomics and taking regular breaks should always be in mind
I found a great article on exercises you can do to break the repetitive stress you place on your body while at your desk. My favorite suggestion is the wrist stretch for people working primarily with a computer:
This is an all around great exercise to do at work, particularly for those working on computers. To perform this stretch you want to extend your arm in front of you with your palm up and then grab the fingers on your other hand. Gently pull hand down to stretch the forearm, and then repeat this with the other side.
Also, if you own a Mac, there’s a great program called AntiRSI to remind you to take regular breaks