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Arm Bar - 팔꺾기 (Pal-kkeok-gi) - Direct Force Hapkido Arm Bar

Authentic Hapkido Straight Arm Hyperextension Lock

Straight arm hyperextension lock with direct downward force. Traditional Hapkido style emphasizing immediate control, explosive entry, and strong submission pressure. The arm bar (Juji-Gatame in Judo, Pal-kkeok-gi in Hapkido) is one of the most effective joint locks, attacking the elbow joint's natural range of motion.

Contrasts with Tae (Lake) Trigram flowing circular technique:

• Tae Style: Circular, flowing, uses momentum and small circles
• This Style: Linear, forceful, direct pressure and immediate submission

Korean Martial Arts Biomechanics:

• Quick Entry (빠른진입): Explosive arm capture with strong grip
• Linear Pressure (직선압박): Straight downward force on elbow
• Immediate Control (즉각제압): No circular motion, direct submission
• Hip Pressure (골반 압박): Hips thrust upward against elbow joint
• Two-on-One Control (2대1 제어): Both hands control one arm
• Body Weight (체중 이용): Full body weight applied to hyperextension

Anatomical Mechanics:

• Elbow joint bends ~145° naturally (flexion)
• Hyperextension beyond 0° (straight) causes pain
• 10-15° hyperextension forces tap or break
• Ligaments (UCL, RCL) stressed beyond limits
• Can cause permanent elbow damage if held too long

Hapkido Principles Applied:

• 강 (Gang - Strength): Direct force application (not flowing)
• 속 (Sok - Speed): Explosive entry prevents escape
• 제 (Je - Control): Complete arm control throughout

Submission Mechanism:

• Opponent's arm extended and isolated
• Elbow joint hyperextended beyond natural range
• Extreme pain forces tap or risks elbow break
• No escape once position secured

Combat Applications:

• Ground fighting dominant position
• Standing arm bar from wrist control
• Counter to opponent's punch (catch and arm bar)
• Submission finish after throw
• Police/security restraint and arrest technique

Technical Requirements:

• Opponent's arm must be straight (can't bend elbow to escape)
• Thumb points up (prevents rotation escape)
• Hips positioned tight against elbow joint
• Legs pinch opponent's body for control
• Body leans back to add pressure

Phases:

1. Entry (진입): 150ms - Quick explosive catch of opponent's arm
2. Position (위치 설정): 180ms - Direct downward drop, secure arm
3. Drop (내려가기): 250ms - Body drops to ground, arm isolated
4. Extension (확장): 150ms - Immediate hyperextension with hip pressure
5. Submission (굴복): 100ms - Maximum pressure, opponent must tap
6. Release (복귀): 150ms - Controlled release after submission

Duration: 980ms (Full arm bar sequence with control)