Why Pay Attention to the Number of Hours You Sleep?

If you are getting less than 7 hours a sleep per night, should you be worried? Can you bank your sleep for those times when you know you'll have sleepless nights? Is catching up on sleep really a thing? Is there such a thing as too much sleep?

Sleep scientist Matt Walker discusses these details and more in this brief Ted Talk. Hear about the science behind the recommendations for how many hours of sleep per night and find out why working on good sleep habits now could help you live longer.