Chapter 5: Three Kingdoms Era

Another unusual feature of ancient Korean fighting was the use of "shaku-riki" (borrowed power), where the practitioner gained strength from sources outside the body, such as from spiritual powers, herbs, and medicines. A popular fighting system called "charyok" (borrowed force) was created by Korean mountainous anchorites called "sonyings." Charyok used such techniques as kicks from a sitting position, strikes to nerve centers, and toe strikes. It also had methods of defense against different animals, such as the wolf, bull, bear, and tiger. Its most popular stance was a position where the hands were held together in front of the chest similar to praying. All main hand strikes were executed from this stance.

During this period, the common style of dress was loose trousers and a jacket held together with a belt tied around the mid-section. The style was similar to the Taekwondo and Judo uniforms of today, and was commonplace throughout the three kingdoms. In the kingdom of Paekche, the military officers wore different colored belts to indicate their rank, and in Silla, they wore colored trim on their lapels as an additional indication of rank. 

Subak's popularity increased after it was adopted by warrior groups that developed throughout the county, one of which was the sonbae.