Doctor Explains Why You DON’T Need 8 Hours Sleep!

Why Do I Feel So Sleepy Despite Having Enough Sleep? – Dr. Berg

Why You're Always Tired - 7 Myths Ruining Your Sleep

Why you're still tired after getting 8 hours of sleep

Do You Really Need 8 Hours of Sleep Every Night? | Body Stuff with Dr. Jen Gunter | TED

How many hours of sleep a night do I need?

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

Too much REM sleep: why do depressed people wake up exhausted? | Human Givens

The brain benefits of deep sleep -- and how to get more of it | Dan Gartenberg

How to Sleep Less and Get More Out of Your Day- Thomas DeLauer

How To Survive A Day On No Sleep

How To Fix Your Sleep Schedule - Reset Your Sleep Pattern (animated)

I Can't Sleep for More Than 4 Hours a Night - Why? | This Morning

What happens when we sleep?

Insomnia: why can't I sleep?

Can You Sleep Too Much? (The Answer Might Surprise You)

This is how you can achieve PERFECT 100% sleep score every night.

How lack of sleep affects health and tips for a good night's rest

How to deal with your insomnia — and finally get to sleep | Sleeping with Science

Why 4 Hours Of Sleep Is Terrible For You — Even If You Don't Feel Tired