Approximately what percentage of your body's daily human growth
Chapter 1

The biology of muscle building

Chapter 2

The sleep laboratory

Chapter 3

Global traditions of recovery

Chapter 4

The nervous system's gear shift

Ch 2 · The sleep laboratory
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esther Sleep debt inflicts a heavy biological toll on the human body.

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esther The Cost of Sleep Debt

Pay the debt, pay the debt, Sleeping under eight is an injury threat.

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The work of rebuilding and integrating only happens when we stop.

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The nightly brain wash

esther The glymphatic system, found in 2013, acts as a brain dishwasher, using cerebrospinal fluid to flush out toxic beta-amyloid proteins.

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The growth hormone surge

esther The nightly surge of growth hormone repairs tissues and strengthens your skeletal system.

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The Snooze Gym
BETA

esther Balance training and sleep to learn how recovery actually builds your fitness.

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Fun Fact

Dream workouts: During REM sleep, your brain sends signals to paralyze your muscles so you don't act out your athletic dreams.

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Gossip

How many hours of sleep do you need?

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Quiz

By what percentage do brain cells shrink during sleep to allow cerebrospinal fluid to wash away waste?

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Quiz

What is the name of the brain's waste clearance system that becomes highly active during deep sleep?

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Quiz

Which specific stage of sleep is most associated with the massive release of growth hormone?

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Quiz

Approximately what percentage of your body's daily human growth hormone is released during deep sleep?

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Quiz

Which stage of sleep is primarily responsible for consolidating motor skills and athletic movements?

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Quiz

What type of memory, crucial for athletes executing complex plays, is consolidated during REM sleep?

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Quiz

Sleep deprivation impairs the synthesis of which crucial muscle energy storage molecule?

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Quiz

According to a 2014 study, adolescent athletes sleeping under 8 hours are how much more likely to suffer an injury?

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