This post was written by H&W instructor Steve Dischiavi, MPT, DPT, ATC, COMT, CSCS. Dr. Dischiavi will be instructing the course that he wrote on "Biomechanical Assessment of the Hip and Pelvis" in Virginia this August.
In an outpatient sports medicine clinic the traditional model of physical therapy evaluation typically includes the therapist reviewing a patients chart and subjective symptom questionnaire of some sort. Then the therapist will bring the patient to an area to begin a subjective history and then onto a physical exam. After these procedures have been completed the therapist will typically assign a working clinical diagnosis and then begin treatment. In short, I would like to suggest a paradigm shift to this traditional model of thinking. Instead of starting the exam on a table with a static assessment of the structures involved and identifying the pain generator, I suggest the therapist begin with a specific set of movements used as an evaluative tool to identify movement dysfunction within the anatomical system as a whole.
All human interactions on earth occur between ground reaction force and gravity, our bodies are mostly just stuck in the middle of this constant battle and typically we succumb to whichever power exposes the weakest link in our biomechanical chains. One of the reasons the biomechanical chains in our bodies are so pliable and vulnerable to constant ground reaction force and gravity acting on them is because we are basically bones or struts suspended in a bag of skin all connected by soft tissue. Suggesting that without skin, fascia, and connective tissue supporting us, we would collapse to the ground in a pile of bones! Ingber (1997), suggested this concept, known as tensegrity, was the “architecture of life.” So in summary, the tensegrity structures are mechanically stable not because of the strength of the individual bones, but because of the way the entire human body distributes and balances mechanical stresses through the use of polyarticular muscle chains called slings. There will be more on slings in the upcoming blogs.