Real conversion outline

Sleep and the Heart: Why Rest Matters

This is the actual chapter and section structure Lecture to Book produced from a public-domain NIH VideoCast lecture, “The Role of Sleep in Health.” Nothing here is a mockup.

1. Introduction: Sleep, the Heart, and a Big Question

   • Meet the Researcher and the Question
   • The Heart's Relentless Work
   • When Arteries Harden

2. Sleep as a Public Health Issue

   • How Heart Disease Develops Over Time
   • An Epidemic of Insufficient Sleep
   • What Sleep Does for the Mind and Relationships

3. The Body's Inner Clock

   • Sleepiness, Fatigue, and the Need for Correct Timing
   • A Clock in Every Cell
   • Timing, Tissue Renewal, and Aging
   • Day and Night Rhythms in the Body

4. Light, Wakefulness, and the Drive to Sleep

   • Light as the Wake Signal
   • The Chemistry of Staying Awake
   • Staying Synchronized

5. Sleep Timing, the Heart, and Sleep Apnea

   • Food, Exercise, and Sleep as Body Cues
   • When Sleep Rhythm Breaks Down
   • Circadian Timing Inside the Heart
   • Sleep Apnea and Cardiovascular Strain

6. Sleep Disorders and the Bigger Picture of Health

   • Types of Sleep Disorders
   • Sleep, Society, and Health Disparities
   • Practical Steps for Better Sleep

7. Common Questions: Jet Lag, Children, and Melatonin

   • Jet Lag and Social Jet Lag
   • How Children's Sleep Differs
   • The Science and Limits of Melatonin

8. The Future of Sleep-Friendly Lighting

   • Tuning Light to the Time of Day