Are You Bi-Phasic or Polyphasic?

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It used to be a cultural norm that we would wake up after four hours of sleep or so, and actually perhaps even have some social encounters. And then back to bed, also a great time to have sex. Well, and as you say, this is, many of us are bi-phasic or polyphasic. Exactly. So key thing is not to worry if you wake up in the middle of the night.

Sleep can enhance your creativity, lift your spirits, improve your sense of humor, and amplify your sociability. So why do so many of us struggle to get a good night's rest? Russell Foster, a professor of circadian neuroscience at the University of Oxford, says it's because we've let the frantic drumbeat of modern life drown out the steady tick-tock of our biological clocks. That's the bad news. The good news is that Russell's here to share science-backed tips that will have you catching more z's in no time.

Russell's new book is "Life Time: Your Body Clock and Its Essential Roles in Good Health and Sleep."

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