February 2025
It was Antonio Borelli who, in 1680, proposed the lever-based model to explain biomechanics. Unfortunately, he died before Newton was able to publish his own famous laws… laws that proved Borelli wrong. Which means that Borelli never had an opportunity to correct his error. His lever-based explanatory model made its way into veterinary research, and into horse training and equitation, and is still the accepted gold standard today.
It wasn’t until the mid-1970s that this model began to be challenged by Steven M. Levin, the “father of human biotensegrity”.
Biotensegrity is an explanatory model that reshapes how we understand the structure and function of living organisms. Biotensegrity offers a lens through which we can view the interconnectedness of anatomical structures and their functional significance. It describes a structural system in which tension and compression forces work in harmony to maintain stability and adaptability. Unlike the traditional view that animal skeletons serve as rigid scaffolds for movement or support, biotensegrity proposes that, in mammals, bones act as compression struts, while soft tissues – such as muscles, tendons, ligaments, and fascia – form a continuous tension network. Together, these elements create a dynamic and resilient structure capable of withstanding external forces and facilitating efficient movement. This holistic perspective is particularly transformative in understanding animal movement, posture, and structural resilience.
During this Community Gathering, Dr. Haussler and his guest collaborators will discuss biotensegrity and how this model can be applied to horses. Maren Diehl wrote a book and lectures about it. Ivana Ruddock-Lange will share her perspective as a veterinarian, anatomist, and dissector.
Community Gatherings are one-hour conversations between Dr. Haussler and his guest collaborators, followed by 30 minutes of discussion with attendees.
Understanding Biotensegrity in Animals
by Kevin Haussler, DVM, DC, PhD, DACVSMR
Biotensegrity is a concept in biology and biomechanics that reshapes how we understand the structure and function of living organisms, including animals. Coined from the terms “biological” and “tensegrity”, biotensegrity offers a lens through which we can view the interconnectedness of anatomical structures and their functional significance. The concept is inspired by tensegrity structures in architecture and engineering. These structures distribute mechanical stresses across a network of interconnected components, enabling remarkable strength and flexibility with minimal material.
What is biotensegrity?
Biotensegrity describes a structural system in which tension and compression forces work in harmony to maintain stability and adaptability. Unlike the traditional view that animal skeletons serve as rigid scaffolds for movement or support, biotensegrity proposes that, in mammals, bones act as compression struts, while soft tissues – such as muscles, tendons, ligaments, and fascia – form a continuous tension network. (The principles of biotensegrity apply to all organisms, including mollusks and trees.) Together, these elements create a dynamic and resilient structure capable of withstanding external forces and facilitating efficient movement. This holistic perspective is particularly transformative in understanding animal movement, posture, and structural resilience.
Biotensegrity challenges traditional anatomical models by emphasizing several key principles:
- Interconnectedness: In organisms, no single anatomical structure operates in isolation. Fascia, for instance, forms a continuous network that integrates muscles, bones, and organs.
- Force distribution: External forces, such as gravity or impact during locomotion, are dispersed throughout the entire body rather than being concentrated on specific joints or structures.
- Adaptability: The biotensegrity framework allows for rapid adjustment to changing conditions, enhancing an animal’s ability to respond to environmental demands.
- Energy efficiency: By leveraging tension and compression, biotensegral systems optimize energy use, reducing the metabolic cost of movement.
Biomechanics and locomotion
In animals, movement requires coordinated actions governed by biotensegrity principles. For example, the thoracolumbar vertebral column is often viewed as a rigid column, whereas it functions more like a flexible, tension-based structure. Elastic recoil in tendons and fascia contributes to energy-efficient locomotion, as seen in the bounding gaits of cheetahs or the endurance horse.
The interplay between the nervous and musculoskeletal systems
The nervous system and musculoskeletal system work in harmony to uphold the principles of biotensegrity. Neural pathways coordinate muscle activation. Proprioceptors within muscles, tendons, and fascia relay critical information about position, tension, and movement to the central nervous system, allowing for real-time adjustments. This feedback loop enables animals to maintain balance, adapt to environmental challenges, and perform complex movements with precision. The integration of neural control with the tension-compression dynamics of the body exemplifies the interconnected nature of biotensegrity, emphasizing the need for a holistic approach in understanding movement and stability.
Biotensegrity in horses
Horses provide a striking example of biotensegrity in action. Their large bodies are supported by slender legs that must withstand significant forces during movement. The suspensory apparatus in a horse’s distal limb exemplifies the balance of tension and compression, enabling the animal to absorb shock and propel forward efficiently. Moreover, the fascial connections between the neck, back, and hindquarters illustrate how tension continuity contributes to coordinated motion and overall biomechanical health. Investigations into the role of fascia, the mechanics of energy storage, and the interplay between nervous and musculoskeletal systems will deepen our understanding of animal health and performance.
Diagnosing imbalances
In dogs and horses, whose musculoskeletal systems are critical for performance and health, disruptions within the biotensegral system can lead to pain, dysfunction, and decreased mobility.
Manual therapies enable clinicians to assess the integrity of the tension-compression network. Practitioners use palpation to evaluate:
- Fascial restrictions: By feeling for areas of stiffness or reduced mobility, clinicians can identify fascial adhesions or restrictions that disrupt the flow of forces through the body.
- Joint dysfunction: Restricted joint motion can indicate imbalances in the surrounding muscular and fascial tissues, or elsewhere, providing clues about the broader biomechanical system.
- Muscle tone and symmetry: Asymmetries in muscle tone or tension may signal compensatory patterns, helping pinpoint areas of tension or weakness within the system.
This hands-on assessment not only informs a diagnosis but also guides targeted treatment strategies tailored to the individual animal’s needs.
Restoring balance
Manual therapies aim to restore the dynamic balance of tension and compression that defines biotensegrity. For example:
- Myofascial release focuses on easing tension in the fascial network. By gently manipulating the fascia, practitioners can improve fascial movements, enhance circulation and lymphatic flow, and reduce pain caused by fascial restrictions.
- Chiropractic care addresses joint dysfunction which can disrupt the balance of forces within the body. Treatment helps to restore joint mobility, re-establish proper tension-compression, and improve neuromuscular communication.
- Massage therapy targets muscle tension and promotes relaxation. Techniques such as deep tissue massage or trigger point therapy can relieve muscle hypertonicity, enhance flexibility and elasticity, and support myofascial interconnections.
- Acupuncture stimulates specific points to reduce pain and inflammation, promote relaxation of tight muscles and fascia, and enhance overall systemic balance.
How exercise supports biotensegrity
Exercise plays a pivotal role in maintaining biotensegrity, the balance of tension and compression forces that defines the structural integrity of the body. Targeted movement supports healthy interactions in the musculoskeletal and fascial systems, leading to better performance, reduced injury risk, and enhanced overall health. Exercise strengthens this network by:
- Improving fascial elasticity: Dynamic movement stretches and hydrates the fascia, maintaining its flexibility and adaptability.
- Promoting joint stability: Controlled exercises help to balance muscles, enhancing joint alignment and preventing instability.
- Building muscular strength: Stronger muscles provide more stable compression forces, thus reducing strain on joints and connective tissues.
Injury prevention
One of the most significant benefits of applying biotensegrity principles is injury prevention. By understanding how forces are distributed throughout the interconnected musculoskeletal and fascial systems, owners, trainers, and clinicians can identify and address areas of vulnerability before they lead to injury. Exercises that enhance neuromuscular coordination, improve proprioception, and restore fascial elasticity help to create a resilient body capable of withstanding both acute and repetitive stresses. This proactive approach reduces the risk of injuries such as strains, sprains, and tendonitis, while also supporting faster recovery when injuries do occur.
In closing…
Biotensegrity is more than a theoretical concept – it is a paradigm shift that challenges us to see animals as integrated, dynamic systems. By embracing this perspective, we can advance fields ranging from biomechanics to veterinary science, ultimately improving the welfare and performance of animals.
Provided by Maren Diehl:
Websites
www.biotensegrity.com (Stephen M. Levin PhD)
https://www.biotensegrityarchive.org/
http://www.tensegrityinbiology.co.uk/ (Graham Scarr)
Books
https://www.amazon.de/Biotensegrity-Structural-Graham-Melvin-Scarr/dp/1909141216
https://www.amazon.com/Everything-Moves-Biotensegrity-Informs-Movement/dp/1909141968
Papers
https://www.sciencedirect.com/science/article/pii/S0306987723002530 (Graham Scarr, Leonid Blyum)
https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2024.1432410/full
Provided by Ivana Ruddock-Lange:
Journal articles
Skalec A, Egerbacher M. The deep fascia and retinacula of the equine forelimb – structure and innervation. J Anat, 2017 Jun 5;231(3):405–416.
Doi: 10.1111/joa.12643
Elbrønd VS, Schultz RM (2015) Myofascia – the unexplored tissue: Myofascial kinetic lines in horses, a model for describing locomotion using comparative dissection studies derived from human lines.
MRA 3 https://doi.org/10.18103/mra.v0i3.125
Scarr G, Levin SM, Lowell de Solorzano S. Moving beyond Vesalius: Why anatomy needs a mapping update, Medical hypothesis 183 (2024) https://doi.org/10.1016/j.mehy.2023.111257
Ingber DE. Cellular tensegrity: defining new rules of biological design that govern the cytoskeleton. J Cell Sci. 1993;104(pt 3):613-627. http://jcs.biologists.org /content/104/3/613.long
Ingber DE. Tensegrity I: cell structure and hierarchical systems biology. J Cell Sci. 2003;116(pt 7):1157-1173. http://jcs.biologists.org/content/116/7/1157
Ingber DE. Tensegrity II: how structural networks influence cellular information processing networks. J Cell Sci. 2003;116(pt 8):1397-1408. http://jcs.biologists.org/content/116/8/1397
Chen CS, Ingber DE. Tensegrity and mechanoregulation: from skeleton to cytoskeleton. Osteoarthritis Cartilage. 1999;7(1):81-94.
Veraa S, Spoormakers TJ. A comparative study of breed differences in the anatomical configuration of the equine vertebral column, J of Anatomy, 2021,
DOI: 10.1111/joa.13456
Masi AT, Hannon JC. Human resting muscle tone (HRMT): narrative introduction and modern concepts, J Bodyw Mov Ther. 2008, DOI: 10.1016/j.jbmt.2008.05.007
Levin S. Bone is fascia https://www.researchgate.net/publication/327142198_Bone_is_fascia
Stecco C., Adstrum S., Hedley G., Schleip R. Update on fascial nomenclature.
J Bodyw Mov Ther, 2018:22:354
Adstrum, S., Hedley, G., Schleip, R., Stecco, C. and Yucesoy, CA. Defining the fascial system. J Bodyw Mov Thera 2017;21: 173-177
Guimberteau, JC. and Delage, JP. The multifibrillar network of the tendon sliding system. Ann Chir Plast Esthet, 2012. DOI: 10.1016/j.anplas.2012.07.002
Ann Chir Plast Esthetique, 2012;57: 467-481.
Huijing, PA. and Baan, GC. Extramuscular myofascial force transmission within the rat anterior tibial compartment: proximo-distal differences in muscle force. Acta Physiol Scand 2001;3: 297-311.
Levin, S., Lowell de Solórzano, S., and Scarr, G. The significance of closed kinematic chains to biological movement and dynamic stability. J Bodyw Mov Thera 2017;21(3): 664-672.
Swanson RL: Biotensegrity: A Unifying Theory of Biological Architecture with Application to Osteopathic Practice. Journal of the American Osteopathic Association, 2013, DOI: 10.7556/jaoa.2013.113.1.34
Sharkey J: Biotensegrity: The fallacy of biomechanics Part 1
Books
Guimberteau J. Architecture of human living fascia. Handsprings Publishing, 2016
Schleip R, Findley TW, Chaitow L, Huijing P: The tensional network of the human body, Elsevier, 2012
Stecco C. Functional atlas of the human fascial system, Elsevier, 2015
Marques JP, Adair S, Clayton H, Haussler K, Maierl J. Essential Facts of Equine Physical Therapy, Rehabilitation and Sport Medicine, 2024
Myers TW: Anatomy Trains, Churchill Livingstone, 2002 (reprint), ISBN 0 443 06351 6: 1-50
Sisson, S. The Anatomy of the Domestic Animals, 1921
Schultz RM, Due T, Elbrond VS. Equine Myofascial Kinetic Lines – for professionals, 2021
Schleip R. Fascial Fitness, 2017, Lotus Publishing, ISBN 978 1 05367719
Online courses
Van der Wal J. – The Embryo in Us
Winter fascia school 2024, University of Padova
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