I completely agree. A few months ago, I started walking for whatever time I had left in my lunch hour after eating. Since I have almost an hour and a half drive each way, I realized I was doing a lot of sitting (especially if I spent the rest of my lunch at my computer). I found the walking has helped with stress and gives me a boost for the afternoon. Also, one of the printers I use is on the other side of the building. My coworkers think it would be inconvenient, but whenever I print something, I get a little mini break away from my work area - helps to relieve any monotony as well.