I used to walk quite a bit at work, sometimes twice during the workday, but have gotten out of the habit. Well, today is the second day in a row now that I've walked at work, as I try to get back into the habit. Today's average pace was two minutes faster than yesterday's though I took a slightly hillier route. Some days are like that.
When I got back to my desk, someone passing by asked if it were raining outside, because my shirt was soaked with sweat! Charming. :)