然而練筋易而練膜难*
However, it is easy to train the tendons but harder to train the membranes
筋有十二經絡**
The fascias are twelve net channels
足太陽之筋***
Fascias of the Foot Great Masculine
Internal practices centre themselves around three notions: fascias, vitality and breathing. If fascias seem to deal with the body power, the external force, vitality with its internal aspect and breathing with rhythm, they are actually intertwined. Indeed, the work on fascias improves one's organs, hence one's vitality, and regulates one's breathing. Vitality, through swifter moves, improves fascias resistance and stronger organs allow a deeper and uninterrupted breathing. Breathing, through relaxation, improves fascias stretching and saves vitality by keeping the emotions under check. One could say the bones, our frame, should be also mentioned as a very important issue. Still, they are a byproduct of vitality through the kidneys and thus included in this one. Since training is often about repetition, it seems opportune to revisit those three concepts from time to time.
The concept of fascias, or connective tissues, which seems to have appeared around the 19th century in modern medicine and became more and more known recently**** is a notion very close, if not alike, to what one of the best known book of Traditional Chinese Medicine, the Yellow Emperor's Inner Classic, describes as 經筋, the fascia channels (a modern fascia line compared to an old Chinese fascia channel). Still, 筋, which is often taken in its meaning "tendons" for a lot of martists, is and has not been the only term used to describe connective tissues. Therefore, it seems necessary to first deal with the terms covering the concept of fascias in Chinese.