01Physiology
Breathing & the vagus nerve
How a slower breath changes heart rhythm, and what that can tell us.
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The Natural Medicine library
Explore the body's rhythms, everyday practices and living traditions — with room for curiosity and careful evidence.
Eleven in-depth guides · English · Polish summaries
A good place to begin
Start with the rhythms you meet every day: a breath, a morning's light, a change in temperature.
01Physiology
How a slower breath changes heart rhythm, and what that can tell us.
Read the guide
03Physiology
Discover how daylight and evening light help shape biological time.
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05Physical practices
Understand heat production, the research on showers and the risks of immersion.
Read the guideThe complete collection
Mechanisms, practical context, research and the questions that remain.
Showing all 11 guides
01Physiology
How a slower breath changes heart rhythm, and what that can tell us.
Read the guide
02Physiology
Explore two different fluid systems, from moving muscles to the sleeping brain.
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03Physiology
Discover how daylight and evening light help shape biological time.
Read the guide
04Physical practices
Separate electrical measurements from the health claims attached to them.
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05Physical practices
Understand heat production, the research on showers and the risks of immersion.
Read the guide
06Physical practices
What alternating water temperatures can tell us about exercise recovery.
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07Mind & body
Meet the signals, sensors and feedback behind a changing heart rhythm.
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08Mind & body
A closer look at a movement tradition and the outcomes researchers measure.
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09Living traditions
European seasonal practices, cultural context and everyday rhythms.
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10Living traditions
Learn what traditional assessment terms mean, and how their reliability is studied.
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11Understanding infection
A practical atlas of human parasites, exposure routes and the questions that guide testing and care.
Read the guideCDC DPDx · Public-domain CDC DPDx material; attribution retained · Original
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Curiosity with context
Each guide brings physiology, research and cultural context into the same conversation. Sources and uncertainty sit beside the ideas they help explain.
Open the reading companionA biological mechanism, a personal experience and a treatment outcome tell us different things.
Who took part, what was compared, and what was actually measured?
Historical meaning deserves care. Health claims need evidence for the particular practice.
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