The New York Times tackles that daily productivity killer called the post-lunch dip — you know, the pull of the yawn toward an afternoon power nap after lunch.

Q. What is happening in the body that it craves rest after lunch? A. First, the 24-hour cycle of the body, or its circadian rhythm, is naturally in a resting phase at this time. In the afternoon, it happens to converge with another physiological cycle—known as homeostatic—that measures the amount of time spent awake and that is also pushing for a rest. Add the effects of food, which can also induce drowsiness, and an overpowering desire to sleep may result.

What’s the best way for one to overcome the urge to nap after lunch?