scientific background
Sources, Evidence, and Method
The articles on this site bring two things into dialogue that rarely meet: the experience of long-term internal martial arts practice, together with the tradition that shapes it, and the findings of contemporary science across several disciplines.
The phenomenological side is straightforward. Fifteen years of daily Chen-style Taijiquan practice produces experiences, of structure, of elastic continuity, of internal quiet and regulation, that are difficult to describe and almost impossible to verify from the outside. That experiential territory is the primary subject of this site.
The tradition is a second source, and a distinct one. Chen-style Taijiquan carries its own body of knowledge: classical concepts such as peng, song and silk-reeling, and the benchmarks and corrections passed down through a teaching lineage, in my case from Wang Haijun. This is accumulated practical knowledge, not physiology, and the site reports it as what the tradition holds.
The scientific side is more complex, because no single discipline maps cleanly onto what internal practice produces. Fascia science offers a framework for understanding connective tissue remodelling and tensegrity. Neurophysiology and autonomic nervous system research offer ways to understand what may happen to vagal tone, interoception, and regulatory capacity over years of deliberate slow practice. Motor learning theory offers a lens on the developmental logic of low-constraint environments, and on why the internal arts training arc might look the way it does. Exercise physiology provides the tools to measure outputs, VO₂ max, lactate dynamics, heart rate variability, that make certain adaptations legible in ways that subjective report alone cannot.
None of these disciplines were developed with internal martial arts in mind, and none of them fully account for what long-term practice produces. What they offer is a set of adjacent frameworks, of varying maturity, that make the phenomenological claims more intelligible and, in some cases, more testable than they might otherwise appear.
How claims are held
Because the site draws on three different sources, it tries to be clear about which is which. The articles contain four kinds of claim. They are not labelled; the phrasing signals the difference.
Established. These are findings with solid research support, for example that tendons store and return elastic energy during movement. The articles state them plainly, and the reading list below covers the research they draw on.
Observed. This is the embodied understanding of the practice I have developed through thousands of hours of training and skill development: how the body organises itself, what changes as skill deepens, and what those changes feel like (to me) from the inside. These claims carry the authority of first-hand experience, but they are not proof of the mechanisms that might explain them.
Taught. This is what the Chen tradition holds: classical concepts, lineage benchmarks, the corrections a teacher gives. These claims are attributed to the tradition and reported as tradition rather than physiology.
Proposed. These are the site's own models and mechanisms, frameworks such as Mechanical Ecology and Biomechanical Debt, or cellular explanations for what practice changes. They are offered as reasoned hypotheses: useful tools for thinking, revisable as evidence develops, not proven discoveries.
The strongest arguments on the site move from what is observed, to what is established, to a proposed link between them. Where an article leans heavily on mechanism, it says so near the top. The aim throughout is to use science to understand what the practice does, not to borrow its authority.
Foundational References
The reading list below is a curated selection of the research and literature this site draws on. It is not a bibliography of proof. It is background for readers who want to understand the scientific territory before engaging with the articles themselves. It ranges from primary research to accessible syntheses.
I. The Chen Tradition
Books
Chen Shi Taijiquan Tushuo (Illustrated Explanation of Chen Family Taijiquan) — Chen Xin (1933; English translations available)
Chen Style Taijiquan: The Source of Taiji Boxing — Davidine Siaw-Voon Sim and David Gaffney
II. Taijiquan Research
Books
The Harvard Medical School Guide to Tai Chi — Peter Wayne with Mark Fuerst
Key Papers
Wayne PM, Kaptchuk TJ — Challenges inherent to t'ai chi research: part I — t'ai chi as a complex multicomponent intervention (Journal of Alternative and Complementary Medicine, 2008)
III. Fascial Biology and Connective Tissue Research
Books
Fascia: The Tensional Network of the Human Body — Robert Schleip, Thomas Findley, Leon Chaitow, Peter Huijing (eds.)
Anatomy Trains: Myofascial Meridians for Manual and Movement Therapists — Thomas Myers
Fascia: What It Is and Why It Matters — David Lesondak
Key Papers
Stecco C et al. — Hyaluronan within fascia in the etiology of myofascial pain (Surgical and Radiologic Anatomy, 2011)
Schleip R, Klingler W, Lehmann-Horn F — Active fascial contractility: fascia may be able to contract in a smooth muscle-like manner and thereby influence musculoskeletal dynamics (Medical Hypotheses, 2005)
Schleip R et al. — Fascia is able to actively contract and may thereby influence musculoskeletal dynamics: a histochemical and mechanographic investigation (Frontiers in Physiology, 2019)
Langevin HM — Connective tissue: a body-wide signaling network? (Medical Hypotheses, 2006)
Wilke J et al. — What is evidence-based about myofascial chains: a systematic review (Archives of Physical Medicine and Rehabilitation, 2016)
IV. Tensegrity and Biotensegrity
Books
Biotensegrity: The Structural Basis of Life — Graham Scarr
Key Papers
Ingber DE — Tensegrity: the architectural basis of cellular mechanotransduction (Annual Review of Physiology, 1997)
Ingber DE — Cellular mechanotransduction: putting all the pieces together again (FASEB Journal, 2006)
Levin SM — The tensegrity-truss as a model for spine mechanics (Journal of Mechanics in Medicine and Biology, 2002)
Levin SM — Tensegrity, the new biomechanics (chapter in Textbook of Musculoskeletal Medicine, 2006)
V. Motor Learning and Skill Acquisition
Books
The Co-ordination and Regulation of Movements — Nikolai Bernstein (1967; foundational text on degrees of freedom and movement organisation)
Dynamic Patterns: The Self-Organization of Brain and Behavior — J.A. Scott Kelso (1995; foundational text on coordination dynamics and attractor states)
Motor Learning and Performance — Richard Schmidt and Timothy Lee
Dynamics of Skill Acquisition: A Constraints-Led Approach — Keith Davids, Chris Button, Simon Bennett
The Ecological Approach to Visual Perception — James Gibson
A Guide to Better Movement: The Science and Practice of Moving with More Skill and Less Pain — Todd Hargrove
The Talent Code — Daniel Coyle (accessible; covers myelin and deliberate practice)
The Inner Game of Tennis — Timothy Gallwey
Key Papers
Wulf G — Attentional focus and motor learning: a review of 15 years (International Review of Sport and Exercise Psychology, 2013)
Masters RSW — Knowledge, knerves and know-how: the role of explicit versus implicit knowledge in the breakdown of a complex motor skill under pressure (British Journal of Psychology, 1992)
Davids K et al. — Movement systems as dynamical systems (Sports Medicine, 2003)
Prinz W — Perception and action planning (European Journal of Cognitive Psychology, 1997; ideomotor tradition)
On Arousal, Stress and Learning
Yerkes RM, Dodson JD — The relation of strength of stimulus to rapidity of habit-formation (Journal of Comparative Neurology and Psychology, 1908; foundational arousal-performance relationship. Note that the modern human performance literature has substantially nuanced this.)
VI. Interoception and Sensory Neuroscience
Books
How Emotions Are Made — Lisa Feldman Barrett (accessible account of interoception and predictive processing)
The Body Keeps the Score — Bessel van der Kolk (somatic memory and interoception, clinical context)
Key Papers
Craig AD — How do you feel? Interoception: the sense of the physiological condition of the body (Nature Reviews Neuroscience, 2002)
Craig AD — How do you feel — now? The anterior insula and human awareness (Nature Reviews Neuroscience, 2009)
Schleip R — Fascial plasticity: a new neurobiological explanation (Journal of Bodywork and Movement Therapies, 2003)
VII. Autonomic Nervous System and Vagal Function
Books
Why Zebras Don't Get Ulcers — Robert Sapolsky (accessible account of stress physiology and the autonomic response)
Key Papers
Imai K et al. — Vagally mediated heart rate recovery after exercise is accelerated in athletes but blunted in patients with chronic heart failure (Journal of the American College of Cardiology, 1994)
Thayer JF, Lane RD — A model of neurovisceral integration in emotion regulation and dysregulation (Journal of Affective Disorders, 2000)
Thayer JF, Brosschot JF — Psychosomatics and psychopathology: looking up and down from the brain (Psychoneuroendocrinology, 2005; HRV as a marker of vagal tone)
Laborde S, Mosley E, Thayer JF — Heart rate variability and cardiac vagal tone in psychophysiological research (Frontiers in Psychology, 2017)
Tracey KJ — The inflammatory reflex (Nature, 2002; cholinergic anti-inflammatory pathway)
VIII. Exercise Physiology and Metabolic Adaptation
Books
Daniels' Running Formula — Jack Daniels (VO₂ max and lactate threshold framework)
The Oxygen Advantage — Patrick McKeown (accessible; breathing mechanics and performance)
Key Papers
Bassett DR, Howley ET — Limiting factors for maximum oxygen uptake and determinants of endurance performance (Medicine and Science in Sports and Exercise, 2000)
Faude O et al. — Lactate threshold concepts: how valid are they? (Sports Medicine, 2009)
Seiler S — What is best practice for training intensity and duration distribution in endurance athletes? (International Journal of Sports Physiology and Performance, 2010)
IX. Longevity and Healthspan Science
Books
Why We Die — Venki Ramakrishnan (molecular biology of aging; the most scientifically rigorous of the four)
The Path to Longevity — Luigi Fontana (diet, exercise, and mind training in retarding the aging process; serious primary researcher)
Outlive: The Science and Art of Longevity — Peter Attia (clinical synthesis of exercise, cardiovascular fitness, and healthspan)
Lifespan: Why We Age and Why We Don't Have To — David Sinclair
Key Papers
López-Otín C et al. — The hallmarks of aging (Cell, 2013)
López-Otín C et al. — Hallmarks of aging: an expanding universe (Cell, 2023)
Fries JF — Aging, natural death, and the compression of morbidity (New England Journal of Medicine, 1980; compression of morbidity hypothesis)
X. Biomechanics and Movement Science
Books
Born to Run — Christopher McDougall (accessible; elastic storage in running)
Move Your DNA — Katy Bowman (movement ecology and tissue loading)
Key Papers
Ker RF et al. — The spring in the arch of the human foot (Nature, 1987; elastic storage)
Roberts TJ — The integrated function of muscles and tendons during locomotion (Comparative Biochemistry and Physiology, 2002)
Komi PV — Stretch-shortening cycle: a powerful model to study normal and fatigued muscle (Journal of Biomechanics, 2000)
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