The Yuk Keun Kyung (Yi Jin Jing 
in Chinese) are a set of ancient Chinese exercises, supposedly created by Pan Wei during the Qing Dynasty. They are similar in purpose and style to the Moo Pahl Dan Kuhm (Ba Duan Jin) exercises familiar to Soo Bahk Do and Tai Chi practitioners worldwide. Kwan Jang Nim Hwang Kee trained in the Chinese arts while he worked on the railroad. It is safe to assume that it was during this period that he came across the Yuk Keun Kyung. He found these techniques to be extremely important and copied the manuscripts in his Volume I textbook on Tang Soo Do (Soo Bahk Do). Anyone who is affiliated with the Moo Duk Kwan or has been influenced by the Moo Duk Kwan should, in my opinion, have an interest in these forgotten exercises. Interestingly, you’ll be hard pressed to find a Korean practitioner who has an understanding of them.
From what I understand, the Yuk Keun Kyung are a set of 12 exercises that resemble many of our modern stretching techniques and are based on Chinese accupuncture points and the 12 meridian system. I’ll be updating this blog post as I continue my research and hope that others will add to it as well. Below is a diagram of some of the techniques. There is also a youtube clip that is helpful.
Outstanding work! Soo Bahk From Region 5, Il
I remember practising these with Master Lee – Head of Greek Tang Soo Do Fed. and Euro TAC Chair. Spent a week with him he was in to accupuncture. I believe he as a do jang in the US now. Not with US Soo Bahk Do Fed.