Week 2 · Your master clock

The Cortisol Rhythm

Cortisol is the hormone that tells your body when to be alert and when to rest. A broken cortisol rhythm is the root of most chronic sleep issues. This week we begin rebuilding it.

This week's lessons
1

How cortisol should work

Healthy cortisol peaks in the morning (giving you energy) and falls through the day, reaching its lowest point at night (allowing sleep). Chronic stress inverts this — low morning cortisol (you can't wake) and high evening cortisol (you can't sleep). 'Tired but wired' is a cortisol problem.

2

Morning light: the anchor

Morning light exposure is the single strongest signal that sets your cortisol rhythm. 10–15 minutes of natural light within 30 minutes of waking resets your master clock. This practice alone transforms sleep for many members within a week.

3

Evening light: the opposite signal

Just as morning light tells your body 'be alert,' evening darkness tells it 'prepare for sleep.' Blue light from screens after sunset suppresses melatonin and keeps cortisol elevated. We address this with dim lighting and screen boundaries.

Your practices

Do these daily

Morning light
10–15 minutes of natural light within 30 minutes of waking. Outside, not through a window.
Evening dim-down
Dim all lights 2 hours before bed. No screens 1 hour before bed.
Journal prompts

Sit with these

“How did morning light change your daytime energy?”
“Did dimming evening light affect how easily you fell asleep?”
This week's herb
Tart cherry
A natural melatonin source. A small glass of tart cherry juice in the evening.
Your action this week
Get morning light daily. Begin the evening dim-down protocol.
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Week 1: Mapping Your Sleep
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Week 3: Nervous System Downshift