Spinal Mechanics

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Synergetic spinal bio-mechanics is a very complicated subject because each section of the spine, ribs, sacroiliac and hips articulate in different ways. Each section has to work in harmony with each of the others to form a coherent synergetic movement . Most theories fall short on this point. This is where John Bayliss’s theories excel. You may have thought this subject had already been covered in depth. It has now.   

This is the official  ‘spinal mechanics’ web site featuring  John Bayliss’s theories and the pioneering breakthroughs he made.

John Bayliss who is now retired and no longer an Osteopath, graduated from the College of Osteopaths in 1987/8 after completing their six year osteopathic course at University College London. The College of Osteopaths at the time made the subject of spinal mechanics a top priority.  However, none of the then current theories they taught, when scrutinized, could explain the sacroiliac mechanism for walking or how the spinal joints synchronize with this basic movement. All the theories were bit part, with no regard to the effect they had on surrounding joints. Even today, in mainstream teaching this void of knowledge still exists.


Far too many questions were left unanswered or glossed over. This prompted John Bayliss to start looking for himself at how the sacroiliac and spinal joints articulate in harmony with each other. That is history. We now know have valid working formulae for synchronous articulation that match the real world movements humans take for granted.  This is what synergetic bio-mechanics is all about.




John Bayliss originally worked out how the sacroiliac joints articulate in harmony with the spinal joints and hip joints back in 2004. Since that time he has worked tirelessly on his theories, and year after year his knowledge has evolved along with his refinement of the PPT method of manipulation.

Most modern research is based on the premise that  ‘structure governs function and this has proved to be its Achilles heel.

John Bayliss worked from the premise that ‘function governs structure’ and worked out how he would design a joint to accomplish any given body movement. His calculations coincided exactly with the shape of the facets and the articulations nature had provided.

How PPT’s and synergetic biomechanics began

Spinal Mechanics - About Us

Bio-mechanics

Sacroiliac Joints

Function Governs Structure