Functional assessments evaluate the whole by looking at the individual parts and how they function together. The body is a synchronous unit meaning it all works together at the same time. That also means that one thing can affect every other thing such as tight quads causing low back problems. 

When the asymmetrical, asynchronous areas of function are known and how they affect the whole, then knowledge and understanding are gleaned and methods of improvement are able to be discerned. Problems that are often not known by the member are revealed. 

Many ah ha moments occur.