I walk on breaks and lunch. I have a fan at my desk. The walks are short so I don't get much sweaty. Not the best work out but better than nothing.

We are lucky enough to have a gym in the building. That makes it a lot easier. But some days I don't get to use it. For example, I'll spend my lunch hour going to the chiropractor today. So no gym. So like Zed_cob says, I'll take walking breaks. My floor is like a perimeter around the building with a huge floor to top ceiling atrium. There's a bridge in the middle for the elevators. So I walk a figure-8, down my side of the hall (clockwise), across the bridge by the elevators, then counter-clockwise to the bridge again and then finish clockwise back to my door. I might get 4 or 4 1/2 figure 8's in the time it takes to walk 2 songs.

I use bouncy songs I like with good drumbeats at different speeds. I have them all mapped out--I used the treadmill--for their speeds in mph. Then I put 8-9 in a playlist. I presently have 4 playlists for variety. I think I just about have enough for a 5th. Keeps it from getting boring. Weird Al's Word Crimes is a fun one to walk but I mostly listen to Christian contemporary or alternative so you may not know my other bands. We Are Brave by Shawn McDonald, for example. I have a few 4mp songs, a few more in the 3.5-3.7 range. So I build up to a semi-fast then take a slower break, then the 4 then ramp back down to a cool down, slow song. If I can only do walking breaks, I generally do 2 songs at a time. So I break up that playlist through the day.