At night, the body does not rest—it works: repairing muscles, releasing growth hormone, sorting memories, balancing blood sugar, and deciding how hungry you will wake up. Cut two hours, and ghrelin is a quarter higher in the morning, insulin works worse, and the craving for sweets is not about willpower. This section is about the mechanics of the night and how not to interfere with them. The main page of the topic is recovery and sleep.
4-5
90-minute sleep cycles
first third
of the night—deep sleep
-30-40%
insulin sensitivity in the evening
5-6 h
caffeine half-life
Ghrelin is released by the stomach—“eat.” Leptin is released by fat—“enough.” One night of four hours: ghrelin +28%, leptin −18%, and the next day plus 300-500 kcal, especially sweets and fatty foods—the brain demands quick energy. Cortisol is above normal in the morning and does not fall in the evening—water retention, belly fat, poor sleep again. A vicious circle. An evidence-based review—hunger hormones and sleep. About nighttime hunger—nighttime hunger and sleep.
The first half of the night is deep slow-wave sleep: growth hormone, muscle recovery, brain cleanup. The second has more REM sleep: memory, emotions, and the brain spends more energy during it. Go to bed after midnight and you lose deep sleep, which cannot be made up in the morning. In a calorie-deficit study, 5.5 hours of sleep versus 8.5 resulted in 55% less fat loss and 60% more muscle loss at the same body weight. Review—sleep stages and fat.
| Disrupts | Why | Repairs | Why |
|---|---|---|---|
| Coffee after 14 | caffeine in the blood until night | coffee before 14 | cleared by evening |
| Dinner at 21-22 | digestion and high blood sugar at night | dinner before 19 | the body has time |
| Alcohol | you fall asleep faster, deep sleep is disrupted | no alcohol | 完整 cycles |
| Screen in bed | blue light blocks melatonin | darkness for an hour | melatonin rises |
| Bedroom at 23° | the body cannot cool down | 17-19° | faster falling asleep |
| Different bedtimes | the clock is disrupted | the same time ±30 min | rhythm |
| Anxiety in bed | cortisol | write tasks down on paper | the brain lets go |
Insulin works 30-40% better in the morning than in the evening—the same plate at 21:00 raises blood sugar higher than at 9:00. Morning light starts the clock; evening darkness triggers melatonin. Late eating shifts the liver and pancreas clocks relative to the brain—desynchronization that keeps weight on. Hence: light during the first half-hour after waking, dinner before 19, darkness from 22. Review—circadian rhythms and meal timing.
Not “relax,” but create a sequence to which the nervous system responds. Dim the light for an hour, temperature 17-19, no screens, put tasks on paper, breathe at 4-6 breaths per minute for 5 minutes, magnesium. If you are not asleep after 20 minutes, get up, use dim light, read a boring book, and return. The bed is for sleep only. After two weeks, most people fall asleep in 10-15 minutes. Review—how to fall asleep.
| Time | What the body does | What disrupts it | What helps |
|---|---|---|---|
| 22-23 | melatonin rises, temperature falls | bright light, screen, heat | dim light, 17-19°, tasks on paper |
| 23-01 | first cycles: deep sleep, growth hormone | late dinner, alcohol, bedtime after midnight | dinner before 19, bedtime before 23 |
| 01-03 | deep sleep, repair of muscles and tissues | caffeine in the blood, noise | coffee before 14, earplugs |
| 03-05 | more REM sleep, memory | cortisol, falling blood sugar—awakening | protein and fats for dinner, magnesium |
| 05-07 | cortisol rises, the body prepares to wake | complete darkness until 9, alarm during deep sleep | light during the first half-hour, wake up at the same time |
The same time ±30 minutes, including weekends. Rhythm matters more than duration.
The two most common sleep disruptors in the method.
17-19° and complete darkness—cheaper than any supplements.
Choosing between an hour of sleep and an hour at the gym—sleep.
During the first weeks, sleep may get worse—not because of food, but because of electrolytes: sodium and magnesium leave with water, and without salt and magnesium it takes longer to fall asleep and awakenings become more frequent. Then the opposite happens: without nighttime blood-sugar swings, sleep becomes steadier, there are fewer 3 a.m. awakenings, and mornings are easier. A dinner with protein and fats before 19 keeps blood sugar steady until morning; a late dinner or sweets before bed bring the awakenings back. People often drink more coffee on the method—and it is also the most common thing to ruin the night: the last cup before 14. Review—sleep on LCHF, magnesium—magnesium.
7-9 hours for adults. Genetically “short sleepers” make up less than 1%. Test: two weeks at 7.5 hours — and compare.
20 minutes before 15:00 — yes. An hour after 16 — ruins the night.
Most often, cortisol or a drop in blood sugar. Have dinner with protein and fats by 19, take magnesium, avoid alcohol. If it persists — an article about cortisol rhythm.
Insulin sensitivity is 30-40% lower in the evening than in the morning. The liver and pancreas have their own clocks, and a late dinner throws them off. Light, darkness, and meal timing as tools.
The nervous system needs a sequence, not advice. Temperature, light, breathing, paper, and the 20-minute rule—a protocol that works for most people within two weeks.
Deep sleep comes in the first half of the night, when growth hormone repairs muscles. Go to bed after midnight — you lose it and will not catch up in the morning. Study: 5.5 versus 8.5 hours while dieting.
One night of four hours — ghrelin plus 28%, leptin minus 18%, plus 300-500 kcal the next day. Research, mechanisms, and what to do if the night was short after all.
Reviewed by Anastasia Zhukova, Fitness Trainer • Author of a Nutrition and Training System • Creator of an AI Personal Support Platform
A human has reviewed this material against the method and real client practice.
