You are not broken
Most people who sleep badly believe something is fundamentally wrong with them.
They have tried everything — melatonin, chamomile tea, white noise, sleep masks —
and nothing works permanently. They start to think they are simply "bad sleepers."
This course is built on one idea: insomnia is a learned problem, and it can be unlearned.
But first, you need to understand what sleep actually is and how it works — because almost
everything you have been told is incomplete.
Force 1: Sleep Pressure
From the moment you wake up, a chemical called adenosine begins
accumulating in your brain. The longer you are awake, the more adenosine builds up — and
the stronger your drive to sleep becomes. This is called sleep pressure or Process S.
When you sleep, adenosine is cleared. When you take a nap, you partially clear it —
which is why a long afternoon nap can make it hard to fall asleep at night.
Sleep pressure is simple: the longer you stay awake, the sleepier you become.
(Caffeine works by blocking adenosine receptors — it doesn't remove adenosine,
it just hides the signal. When caffeine wears off, all that adenosine floods back at once.
That's the "caffeine crash.")
Force 2: Circadian Rhythm
Your body runs a roughly 24-hour internal clock — the circadian rhythm.
This clock regulates temperature, hormones, alertness, and crucially, when you feel
awake and when you feel sleepy.
Your circadian rhythm is primarily set by light. Bright light — especially morning
sunlight — signals "daytime" to your brain. Darkness signals "night." The master clock
sits in a tiny brain region called the suprachiasmatic nucleus (SCN), and it is exquisitely
sensitive to light.
This is why shift workers, travellers, and anyone who stares at bright screens late at night
can have their sleep thrown off — their light exposure is sending the wrong time signal.
Why insomnia persists
Good sleep happens when both forces align: high sleep pressure meets the right
circadian phase (your biological "sleep window"). When these two forces are out of sync —
or when you have built up anxiety around sleep itself — the system breaks down.
Here is the key insight: most chronic insomnia is maintained not by a broken sleep
system, but by the things people do in response to poor sleep. Spending more time in
bed, napping to compensate, going to bed earlier, lying awake worrying — these are
well-intentioned strategies that quietly make insomnia worse.
Over the next five weeks, you will learn exactly why — and what to do instead.
CBT-I (Cognitive Behavioural Therapy for Insomnia) is the most effective treatment
for chronic insomnia. It does not require medication. And its effects last.