5min chapter

TED Business cover image

Do you really need 8 hours of sleep?

TED Business

CHAPTER

How Do We Know When It's Time to Sleep?

Not getting enough sleep is associated with serious health problems like high blood pressure, cartio disease, dipetes and depression. There are two internal biological mechanisms that guide us: sleep drive and circadian rhythm. We spend a lot of time creating routines for kids to keep their clocks happy. But adults often don't know that they need a schedule too. The most powerful cue giver to the clock is absolutely light.

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