You know you need to get enough sleep, but the question remains: How much is enough? Sleep scientist Matt Walker tells us the recommended amount for adults and explains why it’s necessary for your long-term health.

Sleeping with Science, a TED original series, uncovers the facts and secrets behind our nightly slumber. (Made possible with the support of Beautyrest)

Check out more: https://go.ted.com/sleepingwithscience and subscribe to the TED channel: https://www.youtube.com/TED

How much sleep do you really need? | Sleeping with Science, a TED series