Variable HOOK_ANIMATIONConst

Hook - 훅 (곡권 - Gokwon / 갈고리주먹 - Galgori Jumeok)

Curved power punch targeting jaw or temple with circular trajectory. Generates devastating knockout power from hip and shoulder rotation in horizontal plane.

Korean Martial Arts Biomechanics (한국 무술 생체역학):

Stance & Weight Distribution (자세와 체중 분배):

• Start: 60/40 weight distribution
• Peak: 55/45 - MORE BALANCED than cross (circular vs. linear power)
• Hip rotation: ~35-40° (0.61-0.70 rad) - MORE than cross!
• Pivoting: Lead foot pivots OUT ~30° on ball

Chamber/Wind-Up Phase - 준비 (Junbi) [150ms]:

• Lead arm: Pulls BACK to side, elbow bent 90° (1.57 rad) - CRITICAL angle
• Fist position: At shoulder level (어깨 높이), near armpit
• Elbow: Points SIDEWAYS (옆으로), not down - horizontal plane strike
• Rear hand: PROTECTS chin (턱보호) - non-negotiable defense
• Hips: Coil AWAY from target side by ~10-15°
• Shoulders: Wind up like baseball bat swing
• Breathing: Deep inhale (들이마시기)
• Lead foot: Prepares to pivot outward

Rotation & Strike Phase - 회전+타격 (Hoejeon + Tagyeok) [200ms]:

• Hip explosion: Rotates 35-40° toward target (MORE than cross!)
• Lead foot: Ball pivots OUT ~30°, heel comes up slightly
• Torso: Rotates WITH hips in synchronized motion
• Shoulder: Drives around like hammer throw
• Elbow: MAINTAINS 90° bend throughout strike - power comes from rotation, NOT extension
• Fist: Travels in HORIZONTAL ARC (수평호 - Supyeongho)
• Trajectory: Curves AROUND guard to strike side of head
• Hand position: Palm faces DOWN at impact (pronated)

Peak Impact - 정점 (Jeongjeom) [100ms]:

• Impact zone: 턱 (jaw), 관자놀이 (temple), 귀 (ear) - knockout targets
• Fist alignment: Knuckles perpendicular to target surface
• Elbow: STILL bent 90° - rigid arm triangle structure
• Hip: Fully rotated, weight 55/45
• Breathing: Sharp exhale "흣!" (Heut!) with kihap
• Body unity: Fist, elbow, shoulder, hip aligned in CIRCULAR chain
• Follow-through: Hip continues rotation ~5° past impact

Retraction Phase - 회수 (Hoisu) [150ms]:

• Fist returns via SAME CURVED PATH (same arc backward)
• Elbow: Maintains bend, doesn't straighten
• Hip: Counter-rotates back toward neutral
• Lead foot: Pivots back to starting position

Recovery Phase - 복귀 (Bokgwi) [200ms]:

• Return to 중단막기 (middle guard) protecting chin
• Weight: Resets to 60/40 fighting stance
• Hips: Neutral position, ready for next technique
• Breathing: Controlled recovery breath

Combat Applications (전투 응용):

• Primary target: 턱 (chin) - KNOCKOUT potential
• Secondary: 관자놀이 (temple) - brain concussion
• Tertiary: 간장 (liver) if angled downward (body hook)
• Combinations: After jab opens guard - 잽-훅 (Jab-Hook)
• Counter: When opponent ducks straight punches

Biomechanical Principle: "팔이 아니라 몸통으로 친다" (Strike with the torso, not the arm)

• 90° elbow angle = RIGID structure transfers rotation power
• Hip rotation = 70% of power generation
• Shoulder pivot = 20% of power
• Arm extension = 10% only (most people do this wrong!)

Common Mistakes (흔한 실수):

• ❌ Extending arm (팔 펴기) - WRONG! Breaks power structure
• ❌ Arm-only punch (팔만 사용) - No hip rotation = weak hook
• ❌ Dropping rear hand (뒷손 내리기) - Gets countered!
• ✅ Correct: Locked 90° elbow + full hip rotation = knockout power

Taekwondo/Boxing Principle: "회전이 힘이다" (Rotation IS power) The hook is a rotational strike, not a pushing strike - physics of angular momentum!

Total duration: 800ms (HEAVY_LIGHT technique)