If your patients are interested in understanding how their sleep style might impact their life, share this article from The Huffington Post with them.

What you do: You refuse to eat anything when you get up on weekday mornings.

What this could mean: Those with a delayed internal clock (or “chronotype”) would prefer to go to sleep and wake up later than average, explains Till Roenneberg, a German chronobiologist and the author of Internal Time. This means that when you’re forced to wake up just after dawn for work, family or other obligations, your body would rather be sleeping, not eating. Your internal clock influences all physiological processes, says Roenneberg, so not only do you feel lethargic and grumpy, but in addition, your digestive system isn’t ready to handle food. Another clue that you’re a late chronotype: You’re probably famished midmorning, which by your clock is time to eat. You can figure out your chronotype by taking a survey like one developed by Roenneberg. He also suggests this exercise: Note your wake time on non-work days when you don’t need to get up with an alarm clock. Compare it with the time you fell asleep on those days. Then, chart the midpoint, which is called your “midsleep.” If your midsleep is 6 a.m., and your alarm clock is going off at 7 a.m., is it any wonder you’re not in the mood for eggs?