Sasha Pachev does this and I think for some it might be worth doing as well.
Every few hours, take a break, go outside, and run a mile. It doesn’t have to be fast, though it can be. Get back inside, and go back to whatever you were doing before.
Pachev calls it his Always On The Run Routine. He does more typical training each day, but aside from that he sneaks in a mile here, a mile there, throughout every day. It’s a sneaky way to get 20-25 extra miles on top of your training.
A great time to do this is right before or right after eating breakfast or lunch. A run will prime the body for optimal nutrient absorption, and this will allow more of any protein or carbs consumed to be utilized effectively within that optimal half hour window of exercise.
Now, some of you have to dress impeccably for your jobs and doing a little run during the day is not practical. Some of you work on the umpteenth floor of a Downtown tower and can’t practically get to the ground floor, run a mile and come back in 15 minutes. Of course it’s not going to be practical for some during the workday.
But for many, especially though who can dress a bit more casually, or don’t mind running in their work clothes, it may be a useful way to sneak in some extra bits of training.