I switched to a treadmill desk setup in my home office about a year ago and have been pretty happy with it.<p><a href="http://imgur.com/a/zbm35" rel="nofollow">http://imgur.com/a/zbm35</a><p>The desk itself is electric height-adjustable which makes it easy to switch between walking/standing and sitting with the push of a button, and the monitors are mounted on arms so I can move them to the correct height when I switch positions.<p>It took some getting used to before I could walk for extended periods of time, but now I don't really think about it anymore, I just start walking and before I know it, an hour has gone by. That said, I have found that it's hard to really concentrate while walking. If I find myself in the middle of a particularly difficult programming problem, I'll often need to sit down before I can really think about it.<p>But there's a lot of time throughout the day where I'm not doing anything that's super mentally challenging, like reading HN :) or catching up on email or finishing light programming tasks, and I try to walk as much as possible during those times.<p>At this point I typically walk between 1-3 hours total per day, and end up alternating between walking/standing/sitting every hour or so. Sometimes after sitting for a while I find myself starting to feel sleepy, switching to walking at this point usually wakes me right back up and keeps me going. Not sure, why, probably a circulation thing.<p>The setup wasn't particularly cheap to put together (though you could certainly do it for a lot cheaper than I did), but after a year I've concluded the cost was totally worth it considering how many hours of my life I spend (and will continue to spend) in front of a computer.