If you are desk bound all day, taking a break from work is absolutely essential. Even if you can only get up and walk around for ten minutes, it's better than nothing. You'll be more likely to take a walking break if you keep a pair of sneakers with you at work. This bypasses the excuse that you can't speed walk in stilettos. Just slip on your sneaks, get out of the office, and give your brain and body a break.
Fit's Tip: Just because these aren't the sneakers you normally exercise in, doesn't mean you should keep an old beat-up pair at the office. Old sneaks can cause foot and back pain, so make sure your work pair is supportive and comfortable. If you're not sure, then give them the twist test.