Does an HRV spike right before waking up involuntarily have any significance? Had a bad night of sleep, only slept 4 hours, and my HRV was low except for right before I
The Truth About People Who Say They Only Need A Few Hours Of Sleep | SELF
How to Sleep 8 Hours in 4 Hours: Get Less Sleep but Still Feel Rested
Watch Scientist Explains How Rare Genetics Allow Some to Sleep Only 4 Hours a Night | Currents | WIRED
DNA mutation lets some people live healthily on only 4 hours' sleep | New Scientist
Is it possible to survive on only two hours of sleep a day? - Quora
Why Trump May Only Need a Few Hours of Sleep Each Night
I only sleep around 4-5 hours a night. Is this bad for me? - Quora
Can You Survive on Four Hours of Sleep?
Mr Frog has something to say about your sleeping habits : r/dankmemes
How to Sleep 8 Hours in 4 Hours: Get Less Sleep but Still Feel Rested
Oversleeping: Bad for Your Health? | Johns Hopkins Medicine
Short sleepers' can get just 4 hours a night and feel fine. But is their health at risk?
Can you train yourself to get by on 4-5hrs of sleep? - Quora
How to Condition Your Body to Need Less Sleep: 10 Steps
How to Sleep 8 Hours in 4 Hours: Get Less Sleep but Still Feel Rested
Is it healthy to only sleep 4 to 5 hours a night? - Quora
What Happens When You Get Nine Hours of Sleep
Is 2 Hours of Sleep Better Than None? | Interweave Healthcare
Why Some People Only Need 4 Hours of Sleep
