Technique
An 11-technique fundamental wrist-control set developing joint locking, leverage, range-of-motion awareness, bilateral practice and partner safety.
CURRICULUM RELEVANCE
This Knowledge section is connected directly to the current HGMS curriculum record for Sohn Mohk Soo. It may be assessed during National Testing as part of the governed Black Belt journey.
11techniques
View full curriculumTHE CORE KNOWLEDGE
Begin with the overview, training purpose and deeper meaning before exploring the five wider perspectives.
Sohn Mohk Soo is an 11-technique fundamental wrist-control set within the HGMS 1st Dahn curriculum.
The set introduces methods of controlling the wrist and other joints through leverage, positioning and an understanding of joint range of motion.
A central training aim is to develop effective control without relying on greater strength than the opponent.
Sohn Mohk Soo develops:
The practitioner should learn how a joint can be controlled while also understanding how far it can move safely.
The techniques allow a physically weaker person to overcome a stronger adversary by redirecting and reversing the opponent's power rather than meeting it directly.
This is achieved through correct positioning, leverage and manipulation of the natural limitations of the joints.
The aim is control, not force for its own sake.
Understanding the natural range of motion of the wrist and other joints is essential.
The practitioner should learn how to apply control without causing unnecessary injury to a training partner.
This makes sensitivity, precision and restraint part of the technique, not separate from it.
Although the techniques may initially be learned more naturally on one side, they should also be practised on the opposite side.
Developing competence with both hands improves adaptability and prevents the practitioner from becoming dependent on one preferred side.
Sohn Sahl Li Ki, the spreading or opening of the fingers, should be applied where appropriate to maximise the effect of the techniques.
This reinforces the importance of open-hand structure and efficient movement through the hand and wrist.
Sohn Mohk Soo teaches that control depends on understanding structure.
A stronger opponent may have more muscular power, but joints still have natural limits, directions of movement and vulnerable positions.
By understanding those limits and using leverage intelligently, the practitioner can create control without relying on greater strength.
The set also teaches responsibility: effective joint control requires enough sensitivity to know when control has been achieved and enough restraint not to exceed what is necessary.
Sohn Mohk Soo teaches the practitioner to use leverage, understand joint range of motion, recognise structural weakness, train both sides of the body and maintain control without unnecessary injury to a partner.
Complete set training video coming soon.
Original legacy Sohn Mohk Soo source material supplied and confirmed accurate in substance by Brenden O'Sullivan.
Original legacy Sohn Mohk Soo source material supplied and confirmed accurate in substance by Brenden O'Sullivan. Adapted into current HGMS Knowledge language.
FIVE AREAS OF UNDERSTANDING
Discover how each of the five HGMS areas gives another way to understand this Knowledge. A perspective is shown as published only when material is available.
Korean in nature
Sohn Mohk Soo develops fundamental joint-control skills through leverage, positioning and awareness of range of motion.
The set teaches the practitioner to control the wrist and related joints efficiently rather than relying on greater strength.
Bilateral practice and the use of Sohn Sahl Li Ki help develop adaptable, balanced technical ability.
Modern application
Sohn Mohk Soo demonstrates how leverage and joint positioning can allow a smaller or weaker person to control a stronger opponent.
The practitioner learns to work with the natural limits and vulnerable directions of the joints rather than trying to win through muscular force alone.
This makes efficient positioning, sensitivity and control central to the combat value of the set.
Meaning and deeper understanding
Sohn Mohk Soo reinforces the idea that understanding can overcome force.
Greater strength is not automatically the deciding factor when structure, leverage and timing are understood.
The set also carries a responsibility to exercise restraint: the ability to control a joint should be matched by the judgement not to apply more force than is necessary.
Anatomy, health and safe practice
Sohn Mohk Soo acts directly on the wrist and other joints, so awareness of natural range of motion is essential.
Training should develop enough control to apply a lock effectively without unnecessarily exceeding a partner's safe movement range.
Further updates are coming to this section.
Biomechanics, forces and evidence
Sohn Mohk Soo is built around leverage, joint position, direction of force and range of motion.
Joint controls become effective when force is applied in directions where the joint has less available movement and when leverage reduces the amount of muscular effort required.
Further updates are coming to this section.