9 Facts About Sleep That Will Surprise You

    More sleep = more sex? From Arianna Huffington's new book, The Sleep Revolution, a scientific and personal exploration of sleep.

    1. Not getting enough sleep very visibly shows on your skin.

    2. Sleep deprivation increases appetite, with one study finding that sleep-restricted subjects ate an extra 559 calories per day on average.

    3. Getting more sleep can lead to more sex (for women, at least).

    4. 40% of all American adults are sleep deprived, getting less than the recommended minimum of seven hours of sleep per night.

    5. Similar polls showed that 32-60% of people in the UK, more than a third of people in Germany, and two-thirds of those in Japan do not get sufficient sleep during the week.

    6. After being awake for 17-19 hours, you may experience cognitive impairment similar to having a blood alcohol level of .05%.

    7. If you stay awake for a few more hours beyond that, your cognitive impairment increases to the equivalent of legal drunkenness — 0.1%.

    8. Car accidents caused by sleepiness have a fatality rate and injury severity level similar to those caused by alcohol.

    9. But the incidence of death from all causes increases by 15% when you sleep less than five hours a night.

    Arianna Huffington's The Sleep Revolution is in stores now. To learn more, click here.