The Times newspaper had an interesting list of Fitness products which you can use at work this week.
The USB stepper sounds intriguing; if you stop stepping, your keyboard and mouse stop working (I suspect that I would use this to avoid both exercise and work, however…)
Some of the gear could be a bit annoying to your colleagues (the wobble-board to stand on, for instance), depending on your office set up. The air desk mentioned, however, really caught my attention as a potentially great way to rig up your laptop alongside exercise equipment – not too office-friendly in many cases, I’d imagine, but could be ideal if you work from home and have a dusty exercise bike tucked away that you rarely use…
Ultimately, though, my view is that these items are little more than fun gizmos; of course, doing something is better than nothing, but for ideal results, you want to be doing exercise that leaves you out of breath and sweating — not a state likely to endear you to your colleagues!