Two maps of the same day: one from practice, one from measurement.
Outer ring · the classical map (traditional view)
Inner ring · what is measured
The tradition
Measured
1Melatonin begins to rise · ~2 h before usual bedtime
2Deep sleep dominates · first half of night
3Core temperature at its lowest · ~4–6 AM
4Cortisol peaks · first hour after waking
5Alertness climbs · mid-morning
Text version of the twelve watches
23–01: Gallbladder
01–03: Liver
03–05: Lung
05–07: Large intestine
07–09: Stomach
09–11: Spleen
11–13: Heart
13–15: Small intestine
15–17: Bladder
17–19: Kidney
19–21: Pericardium
21–23: Triple burner
Select an hour. The outer ring shows the tradition's two-hour watches; the inner ring shows rhythms measured in sleep research. They are different kinds of map: the traditional hours describe practice, not measurement.
Read the two side by side, not as proof of each other.
9–11 PMThe tradition's hours for winding down. Measured separately: melatonin usually starts to rise in the hours before your usual bedtime.
MidnightGuarded in the tradition. Measured: deep sleep is concentrated in the first half of the night.
1–6 AMThe tradition ties 1–3 AM to the liver. Measured: body temperature reaches its low point, and sleep is lighter toward morning.
Press, don't needle: acupressure is the form you can do yourself.
Education · not a medical claim
On the palm side of the wrist, on the crease, just inside the tendon on the little-finger side.
Wrist crease point HT7
Where
Wrist crease, little-finger side, in the hollow beside the tendon (WHO, 2008).
How to press
Thumb or fingertip. Firm enough to feel, never enough to hurt. Thirty slow breaths — about one to two minutes — on each side, in the hour before bed.
The tradition and the research
The tradition says
Calms the spirit; the classic point for a mind that won't settle (Deadman et al., 2007).
What the research shows
In trials — mostly small, and rarely blinded — pressing points such as HT7 and PC6 before bed improved how people rated their sleep, compared with no treatment or sham points. Reviewers rate the evidence as low quality and want better studies.
03
Chapter 03
The tongue, in one screen
Four things the tradition looks at in a mirror.
ColourPale pink is typical. Paler can read as running low on energy; redder, as running warm.
CoatingA thin white coating is typical. Thicker can read as heaviness; yellow, as warmth; patchy, as running dry.
ShapeSwollen, with tooth marks along the edges, can read as low energy.
MoistureVery wet can read as heaviness; very dry, as running dry.
Sources World Health Organization, 2007, 2022 — traditional readings
Nine body types. In surveys, every unbalanced type was linked to poorer sleep.
Balanced
Low energy
Running cold
Running warm & dry
Heavy & damp
Heat & oil
Stagnant circulation
Tense & stuck
Sensitive
One balanced type and eight unbalanced ones. Most people are a blend of two or three.
Sources Body-type standards published in 2009 and 2025 · a tendency you live with, not a condition you treat
8,517adults in one survey: each of the eight unbalanced types was linked to poorer sleep than the balanced typeGao et al., 2025
4.0× · 3.8×the strongest links, for the types we call Tense & stuck and Stagnant circulation (odds of poor sleep, compared with Balanced)Gao et al., 2025
How this study was done +
Gao et al. (2025) surveyed 8,517 adults in a population-based cohort. Body type was scored with a standard nine-type questionnaire; sleep with the Pittsburgh Sleep Quality Index, where a score above 5 counted as poor sleep. The analysis adjusted for age, lifestyle and existing conditions. It is a cross-sectional survey: it shows which body types and poorer sleep go together, not which causes which.
Odds of poor sleep compared with the balanced type: any unbalanced type 2.6 (95% CI 2.3–3.0); Tense & stuck 4.0 (3.0–5.5); Stagnant circulation 3.8 (2.3–6.2). A 2026 correction removed stray percent signs from the confidence intervals; the numbers did not change.
Why our formula begins with a seed
c. 200 CEA physician's handbook records a formula led by jujube seed, known in Chinese herbal tradition as suan zao ren, for restless nights when the body is worn out (Scheid et al., 2009).
Early herbal textsJujube seed is described as calming (Bensky et al., 2004).
Deep Restore No.21Our formula starts from that seed, with poria and reishi alongside it, plus chamomile, glycine, L-theanine, GABA and magnesium.
Questions
What people ask about the tradition.
Is the traditional body clock real?
It is a real part of the tradition, used for centuries as a map of practice, not a measurement of the body. Sleep science measures daily rhythms in its own way; we show the two side by side without treating either as proof of the other.
Why do I wake up at 3 AM?
The tradition ties the small hours to the liver. Sleep science notes that the second half of the night holds more light sleep, which is easier to break. If it happens most nights for weeks, talk to a doctor.
Do pressure points for sleep actually work?
Small, rarely blinded trials of points such as HT7 and PC6 found people rated their sleep better. Reviewers call the evidence low quality. It is safe, free and calming.
What does "Low energy" mean as a body type?
One of nine body types: tiring easily, a soft voice, sweating easily, a pale tongue with tooth marks. It describes a tendency, not a diagnosis.
Why jujube seed and not, say, valerian?
Our formula starts from a jujube seed formula recorded around 200 CE, in which the seed is the lead ingredient. What research on single ingredients shows is on the product page.
Is this medical advice?
No. It is education about a tradition and the research that has looked at it.
Sources
Unschuld & Tessenow (2011) Huang Di Nei Jing Su Wen
WHO (2007) International standard terminologies on traditional medicine
