Circadian Sleep
When familiar sleep advice still does not fit your life - based on 120 scientific studies
You may already know the usual advice: seek morning light, dim the evening, cut caffeine, move, eat earlier, cool the room, or consider melatonin. The harder question is which lever fits your actual problem, when to use it, and what not to sacrifice.
A practical map for better timing decisions
This evidence-informed guide helps you distinguish a late body clock, an irregular schedule, insufficient sleep opportunity, and a problem that deserves professional care. It turns scattered tactics into a coordinated, realistic approach.
- Choose a feasible timing target instead of chasing a perfect schedule.
- Understand how light, darkness, caffeine, exercise, meals, temperature, and melatonin serve different jobs.
- Reduce social jetlag and adapt decisions for shift work or adolescent school schedules.
- Read claims about performance and health without confusing association with proof.
The book combines a short foundation with focused modules, decision tables, examples, and safety boundaries. Its conclusions are grounded in 120 scientific studies, with uncertainty kept visible rather than replaced by hype.
No rigid reset, gadget-first routine, or one-size-fits-all clock time. You get a calm framework for choosing the smallest useful set of changes while protecting enough sleep and respecting work, family, season, and health constraints.
Make your next timing choice easier to explain and easier to sustain. Choose Circadian Sleep today.
Table of Contents
Introduction
Part 1: How Your Body Clock Shapes Sleep
Chapter 1: Understand How Light Sets Your Body Clock
Chapter 2: Recognize Chronotype and Reduce Social Jetlag
Chapter 3: Build Regular Sleep Timing Without Chasing Perfection
Part 2: Timing Levers You Can Use
Chapter 4: Use Light and Darkness to Shift Sleep Earlier or Later
Chapter 5: Reduce Evening Blue-Rich Light Without Chasing Gadgets
Chapter 6: Use Melatonin as a Timing Tool Rather Than a Sedative
Chapter 7: Shift a Delayed Sleep Schedule with a Coordinated Plan
Chapter 8: Time Exercise to Support Sleep and Circadian Goals
Chapter 9: Move Eating Earlier When It Supports Your Goals
Chapter 10: Use Temperature to Make Sleep Onset Easier
Chapter 11: Set a Caffeine Cutoff That Fits Your Sensitivity
Part 3: When Social Schedules Fight Biology
Chapter 12: Protect Sleep and Alertness During Shift Work
Chapter 13: Help Adolescents Sleep on School Schedules
Part 4: Reading the Evidence on Sleep, Performance, and Health
Chapter 14: Recognize How Sleep Loss Affects Thinking and Performance
Chapter 15: Understand How Sleep Loss Can Change Appetite and Blood Sugar
Chapter 16: Interpret Sleep Duration, Regularity, and Heart-Health Evidence
Chapter 17: Understand What Sleep Studies Show About Immune Function
Chapter 18: Understand Sleep's Place in Mental Health Care
Conclusion
Bibliography
