結果 : is it bad to sleep at daytime
0:41

How many hours of sleep a night do I need?

Columbia University Irving Medical Center
120,992 回視聴 - 11 年前
2:55

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

TED
675,347 回視聴 - 4 年前
2:41

How To Survive A Day On No Sleep

Seeker
947,492 回視聴 - 10 年前
1:01

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

WCNC
150,951 回視聴 - 4 年前
1:58

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

Insider Tech
451,366 回視聴 - 7 年前
3:57

How To Take The Ideal Nap And Avoid Bad Sleep

Insider Tech
362,981 回視聴 - 7 年前
3:54

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

TED
3,335,242 回視聴 - 2 年前
0:35

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

Dr Karan
3,258,577 回視聴 - 1 年前

-
0:45

Finding Balance: Coping with Sleep Deprivation

Max Dice
405 回視聴 - 2 日前
2:45

What happens when we sleep?

The Economist
10,349,494 回視聴 - 5 年前
6:25

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

Better Than Yesterday
398,099 回視聴 - 5 年前

-
1:19

How many hours of sleep do you need?

Mount Sinai Health System
767,870 回視聴 - 7 年前
2:27

Can You Get Too Much Sleep?

SciShow
542,533 回視聴 - 8 年前
1:51

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

This Morning
55,622 回視聴 - 6 年前
3:01

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

Thomas DeLauer
265,871 回視聴 - 9 年前
4:35

What would happen if you didn’t sleep? - Claudia Aguirre

TED-Ed
14,325,025 回視聴 - 9 年前
1:28

Pulling an All-Nighter vs. 2 Hours of Sleep: Which is Worse? – Healthy Living and Diet Tips–SELF

SELF
232,488 回視聴 - 10 年前
5:51

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

CBS Mornings
273,497 回視聴 - 7 年前
1:54

Best and Worst Times to Sleep

TechnionSociety
127,793 回視聴 - 14 年前
3:58

What Happens to Your Body on Little Sleep?

ABC News
1,136,220 回視聴 - 9 年前