Sequencing
Your biology operates on opportunity windows. This chapter shows how to synchronize your habits with your circadian rhythms for a multiplier effect.
The concept: intelligent stacking
Each action has an optimal window. Stacking habits amplifies their effects. One action prepares the ground for the next.
The theoretical framework: why sequencing works
Circadian sequencing rests on three precise biological facts. These levers explain why the same behavior (eating, running, meditating) produces radically different effects depending on when it is performed.
- One central clock, many peripheral clocks. The hypothalamic suprachiasmatic nucleus (SCN) sets the whole body on a ~24.2-hour rhythm. Each tissue (liver, muscle, gut, etc.) carries its own peripheral clock that synchronizes with the SCN. Desynchronization between these clocks drives inflammation and metabolic inefficiency.
- Light, the dominant zeitgeber. Intrinsically photosensitive retinal ganglion cells (ipRGCs, melanopsin-based) detect light independently of vision. Natural light exposure within 30 minutes of waking calibrates all peripheral clocks. The DLMO (Dim Light Melatonin Onset) — the start of melatonin secretion ~14 hours after morning exposure — determines the quality of the following night's sleep.
- Hormonal sensitivity varies by time of day. Insulin sensitivity is roughly 30 to 50% higher in the morning than in the evening. The optimal morning cortisol peak for cognitive and physical performance falls within 2 to 3 hours of waking. Testosterone and growth hormone peak at night, tied to deep sleep. Aligning actions to these peaks multiplies their effectiveness.
Going further in the Handbook
Key principles
The day begins the night before (sleep priority)
Last meal ≥3-4h before bed
Eating window of 5-8h maximum
Regular movement throughout the day
Wind-down ritual 30-60 min before bed
Phase 1: activation & alignment
Morning — Healthy cortisol peak, hydration, light signal
Natural wake-up (no harsh alarm)
Outdoor natural light exposure (10-15 min): circadian synchronization, residual melatonin suppression. Even on overcast days, outdoor light (~10,000 lux) exceeds indoor lighting (300-500 lux) by a factor of 20
Body composition measurement (optional)
Breathing exercise/meditation (5 min)
Hydration: 50cl water + electrolytes
Hair product application (if protocol)
Dietary supplement intake
Training (60-90 min) — Zone 2 or Strength
Dry sauna (20 min) if available
Shower + morning skincare routine
Phase 2: performance & focused concentration
Daytime — Glycemic stability, cognitive focus
Focused work (90 min of concentrated work)
Solar micro-break: 15-30 min outdoor walk, bare skin (arms, legs). Optimal window for vitamin D synthesis and cutaneous nitric oxide release. No sunscreen during this window
First meal: protein + healthy fats
Every 30 min: 2-3 min light activity
Last meal of eating window — Stop liquids (avoid nighttime waking)
Phase 3: downregulation & repair
Evening — Cortisol drop, melatonin rise
10 min walk + social time
"Digital Sunset": blue light filters
Evening skincare/haircare routine
Light activity (e.g., reading)
Bedtime — Room 15-19°C