Advanced Standing Joint Locks for Real Combat. 실전을 위한 고급 스탠딩 관절기. Saturday Gongkwon Yusul Advanced Training. Through Matdaegi joint lock training, we take time to re-examine the true depth of technique. Joint locks are not completed in a single movement. Only by understanding the principles and repeating the same motion countless times does the technique become engraved in the body. Especially when you understand the principles of standing joint locks, you naturally begin to absorb the philosoph