**Introducing the Arthro-myofascial complex. (4xT®Method the ArthroMyofascial Therapy: Chapter 3)*1*.** **Fascia more than myofascia!** By Robbert van Amstel & Karl Noten Fascia is a specialized connective tissue sheat and is most often misplaced as synonym for connective tissue, simple because it is not known that it is a general name for various phenotypes structures like the stratum membranosum, deep fascia, epi-peri-endomysium, intermuscular septa, capsules, and ligaments which are interfascial linked. Better said, it is a fascial network which consists of different fasciae. A fascia is a sheath of connective tissue that forms beneath the skin to attach, enclose, and separate not only muscles, but also bones, nerves, blood vessels, and organs. Each fascia within this network consists of a unique extracellular matrix that determines the fascial biomechanical content. The mechanical properties of each a fascia are unique and has a variety of mechanical properties. The mechanical behavior of fasciae under stress can be classified as elastic (stiffness), viscoelastic, plastic, anisotropic, and strain strength. The viscoelastic property of fascia determines the stiffness and thereby the resistance to stress. Take these elements into account, and you will see that fascia isn’t that vague, though, it should be classified into 1) a fascia, 2) fasciae (multiple a fascia) and 3) the fascial system (Schleip et al., 2019). Besides the ‘ more known’ myofascia we also have to mind the superficial fascia, deep fascia, visceral fascia, and arthrofascia which is a nice classification for clinicians. These fasciae working together in human movements . These are important clinical factors in an arthro-myofascial approach for clinicians and physiotherapists. See picture 1. ![enter image description here][1] [1]: https://files.osf.io/v1/resources/d85k3/providers/osfstorage/645419ea7177850b4ab0f541?mode=render