The Concept of Tetrahedron Biomechanics

Tetrahedron Biomechanics

The concept of tetrahedron biomechanics: Utilizing therapy to help pain, injury and postural problems.

What is Tetrahedron Biomechanics? Parts of the body are conceptualized as an interconnected series of three-dimensional pyramids (called tetrahedrons). When any of these tetrahedrons act — or are acted upon — the shapes above and below it are affected. This discovery led to development of a method of rehabilitation, injury prevention and muscular skeletal manipulation based on Tetrahedron Biomechanics.

When you look at the body from a tetrahedron bio mechanic perspective you can see the systemic implications of exercise and how improper exercise can lead to pain, injury and posture problems. Posture while you do exercise is so vital for proper muscular engagement. In fact, improper posture can cause lots of problems in the musculoskeletal system including pain, injury and posture problems.

Any postural deviation or bad posture causes muscles to fire in an unhealthy way creating imbalance. If you look at the X model in tetrahedron bio mechanics, imagine an X crossing the body between the shoulders and hips. This will describe how to look at the biomechanics of the body and how to individualize postural analysis. The space between can be seen as two tetrahedrons with tips at the top facing each other.

When dealing with this X model, the effect of one point on the others can be understood as follows:

  • The right shoulder impacts: the left shoulder, the right hip, the left hip
  • The left shoulder impacts: the right shoulder, the left hip, the right hip
  • The right hip impacts: the left hip, the right shoulder, the left shoulder
  • The left hip impacts: the right hip, the left shoulder, the right shoulder.
  • The muscles in between the shoulder blades impact the abdominal muscles.
  • The abdominal muscles impact the muscles in between the shoulder blades.
  • The chest muscles impact the lower back and the lower back impacts the chest muscles.

A simple example: If someone were to bend and pick up a piece of paper with his or her knees locked out, there would be a distortion of that person’s tetrahedron between the shoulders and hips and also a distortion of the tetrahedron between the hips and the knees.

Tetrahedron Biomechanics is a way of understanding how vitally important posture is in prevention and resolution of pain, injury and postural problems.


Michael Moschel is the founder & CEO of Symmetry Central and is an accomplished massage therapist and published author of The Dysfunction Manifesto (M/U/S/T Publishing 2013). He has been providing fitness training since 1996 and massage therapy for pain, posture and muscular imbalance since 2001. After becoming a licensed massage therapist and seeing the limitations that he was taught, Michael began his quest to help rectify muscular skeletal dysfunction that led him to develop the scientifically sound and professionally endorsed Moschel Method®. The Moschel Method® looks at Tetrahedron Biomechanics, which is the systemic biomechanical interaction of the muscular skeletal system. This methodology lead to and was incorporated into the development and manufacturing of Symmetry Central’s patented exercise machines. For more information contact Symmetry Central at 212 255 7430 or email

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