What is Kup So in Korean terminology?

Kup So, in Korean terminology, refers specifically to vital points in the context of martial arts. Understanding vital points is essential for practitioners because these are specific areas on the body that, when targeted appropriately, can lead to significant effects on an opponent's physical state. This concept is often woven into the techniques and strategies of martial arts, where knowledge of anatomy and the body's weak spots can enhance both self-defense and combat effectiveness.

The other options pertain to different concepts within martial arts terminology. For example, "low abdomen" is a general anatomical term and does not represent the concept of targeted areas. “Solar plexus” is indeed a vital area but is more specific than the broader term "vital points." Lastly, "fist" relates to the hand's striking capability, which is a fundamental aspect of martial arts but does not convey the deeper understanding of the body's sensitive areas that "Kup So" embodies. Thus, recognizing "Kup So" as vital points highlights its significance in strategic training and application in martial arts.