Hi AnoodyPT

Glad you found there this helpful

The idea of muscle imbalance is not new However Shirley Sharmann has taken it to a new level She puts forward a "Kinesiopathological model" that it is the adoption of suboptimal motor control (such as the adopting of poor postures and inefficient movements) over a long time that leads to maladaptive changes in muscles (shrtening of some muscles, lengthening of others, over development of some and weakening of others ) which in turn stress other soft tissues and joint structures. in the case of an acute injury the pathokinesiological model accounts for damaged structures (damaged structure causes abnormal movement/pain. But in most things we see the Kinesiopathological model it is the the abnormal movement that that stresses the locomotor system and this model is posited for such problems as overuse and process injuries, degenerative joint changes, tendonopathies.

Here are a couple of things to look at:

YouTube - Ann Kaleckas Lecture April 22 2008 Shirley Sahrmann.

This lecture gives an overview of Dr Sahrmann and where she is coming from.

Here text book is:

Amazon.com: Diagnosis and Treatment of Movement Impairment Syndromes (9780801672057): Shirley Sahrmann PT PhD FAPTA: Books

To really get skilled at her method you really need to attend one of her courses But the books is very detailed and covers what you need to do

Courses on Diagnosis and Treatment of Movement System Impairment Syndromes

Her methods don't have much evidence for it but personally I think it is a very fruitful area of research and it would be great to see some clinical trials on this approach. In the mean time it provides a rationale for preventing and managing these more chronic and difficult-to-treat problems where one addresses the underlying mechanisms rather than just offering symptomatic treatment.