This study from Cornel University suggests that standing at our desks isn’t as healthy as we may think, and that sitting may actually be better after all. Moreover, it tells us what we all already know: it is important to get up and away from your desk and move around on a regular basis.
BreakTime may be the best Mac app I’ve seen to help remind me to take breaks. It’s a background utility app that doesn’t require a Menu Bar icon and it has some clever and helpful configuration options. Five bucks in the Mac App Store.