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Sleep
polyphasic sleep
sun lamps
circadian cycle
Why is sleep important?
We don't really know.
heightened anabolic state, growth and rejuvenation of the immune, nervous, skeletal and muscular systems
eat at the same time
you spend 1/3 of your life sleeping
waking the same time
more melatonin: better sleep
more dark: more melatonin
Biological clock
circadian rhythm synced with light and adjusts body temperature, enzymes, etc
5 stages of sleep
breathing, heart rate increase, dreaming, muscles are paralyzed
we don't know why REM is useful but lack of it impairs ability to learn complex things
you don't snore!
adults reach REM every 90 minutes
10-20 minutes
dozing off, brainwave change, you get more and more relaxed, heart rate, body temperature drops
hypnic jerk
muscles resting
brain misinterprets as indications of falling
brain sends signals to arm and leg muscles
deeper sleep
newborns: 18 hour
hacks
super slow brainwaves, deep sleep, brain is resting, growth hormones, body rejuvenates
adults: 8 hours
"highlanders": 6-7 hours
sleep inertia
old people: 6 hours
giraffes: 1.9 hours
a physiological state characterized by a decline in motor dexterity and a subjective feeling of grogginess immediately following an abrupt awakening
adults with newborns?
waking from deep sleep will make you feel like shit
alarm clocks
coffee
blocking adenosine receptors in the brain