Learn more about health with this collection
The value of hard work and persistence
How to stay focused on long-term goals
How to learn from failures and setbacks
Matthew Walker’s intro to REM Sleep & Non-Rem Sleep:
20%-25% in REM sleep
20%-30% in deep non-REM sleep
The rest in light non-REM sleep
Seven to nine hours of sleep covers the vast distribution of human sleep need
Genetic short sleepers (6 hours or less) are incredibly rare – you may be resilient but lack of sleep can lead to hypertension, impaired cognitive ability, immune system deficiencies.
The best REM sleep doesn’t enter the cycle until the last couple of hours of the night, you need a minimum amount of sleep to access it
Different stages of sleep have different benefits for your mind and body
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Metrics that Matthew uses for sleep tracking:
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The snooze button is the perennial expression of the human frustration of chronic lingering sleep debt
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Experiment: If you regularly set an alarm clock, would you wake up at that same relative time without the alarm clock?
If the answer is no, you’re not listening to your body’s needs and are probably running on a sleep deficit.
Don’t force sleep, it’s dangerous to stay awake in...
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The harder you try to sleep, the harder it becomes
Don’t try to ca...
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Drinking coffee is objectively good, the timing and dosage is the problem
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Different people need different amounts of sleep. Some people can function with fewer than six hours of sleep a night, while others can’t manage without at least nine hours. Research shows that getting insufficient sleep can have negative effects on health, etc.
Experiment subjects who are ...
Surviving on a glorified power nap has more to do with genes than motivation. An estimated 5% of the population only needs a few hours to feel refreshed thanks to a rare genetic mutation. Most people need seven to nine hours a night.
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