This article, and the one from the other day (http://news.ycombinator.com/item?id=176526) inspired a little idea: bite-size exercise.

You subscribe to a (Twitter?) feed of simple, two-minute, quick-break-from-your-desk exercises, like "do 20 pushups", "walk up and down a flight of stairs 3 times", or "jog around the block." These exercises are explicitly designed for busy folks like us who spend too much time sitting in front of a computer.

You get a task like this every few hours. When you complete the task, you reply to the message. You can see who did the exercise, poke friends who haven't yet done it, encourage each other. Office-mates could make it a shared break.

Maybe there's a "step it up" button, which increases the intensity (like on a treadmill) -- you go from 20 pushups to 30, for example. Eventually, use historical data to customize exercises.

Thoughts?