×

Straight Ankle Lock – Detailed Breakdown

Target:

Ankle joint, specifically the Achilles tendon and surrounding ligaments.

Positional Mechanics:

• Control: The attacker controls the opponent’s leg in a straight leg entanglement (Ashi Garami, 50/50, or outside Ashi). The foot is trapped under the armpit or between bicep and forearm.
• Leverage: The forearm (radius bone) is placed across the Achilles tendon with a figure-four grip for reinforcement.
• Body Alignment: Body aligned with opponent’s leg, hips close to opponent’s hip to prevent rotation.

Force Application:

• Hyperextension: Primary force hyperextends the ankle by extending hips forward while pulling foot back.
• Compression/Shear: Forearm creates compression on Achilles and shearing force on ankle joint.
• Direction: Force applied along leg length – pushing knee away, pulling foot back.

Key Principles:

• Isolation of ankle joint
• Maximize mechanical advantage
• Hip drive for power
• Control opponent’s knee

×

Heel Hook – Detailed Breakdown

Target:

Knee joint (ACL, PCL, MCL, LCL) and ankle joint through rotational force.

Positional Mechanics:

• Control: Leg secured in entangled position (outside Ashi, inside Ashi, 50/50, saddle). Heel controlled with C-grip or S-grip.
• Leverage: Arm across heel with strong grip, toes tucked into armpit or under chin.
• Body Alignment: Body positioned for rotational lever against knee, hips close to opponent’s knee.

Force Application:

• Rotational Force: Primary torque applied to knee joint by twisting heel while stabilizing knee.
• Hip Extension/Twist: Hip extension and torso twist drive rotational force through heel into knee.
• Direction: Rotational vectors around knee joint – twisting heel vs. stabilizing knee.

Key Principles:

• Knee stabilization crucial
• Secure heel control
• Hip and torso engagement
• Leg entanglement for isolation

×

Toe Hold – Detailed Breakdown

Target:

Ankle joint, specifically ligaments and small bones of the foot, indirectly affecting the knee.

Positional Mechanics:

• Control: Figure-four grip on foot, similar to Kimura grip. One hand grips toes/ball of foot, other grips own wrist.
• Leverage: Grip allows twisting motion of foot. Body perpendicular to leg for maximum leverage.
• Body Alignment: Body positioned for rotational lever against ankle, hips close to leg.

Force Application:

• Rotational Force: Primary torque applied to ankle by twisting foot while stabilizing leg.
• Hyperextension/Compression: Secondary components depending on twist angle and direction.
• Direction: Rotational vectors around ankle – twisting foot vs. stabilizing leg.

Key Principles:

• Figure-four grip essential
• Maintain foot control
• Proper body alignment
• Prevent leg rotation

×

Kneebar – Detailed Breakdown

Target:

Knee joint, specifically hyperextension of the knee.

Positional Mechanics:

• Control: Isolate one leg by trapping between own legs or figure-four arm grip. Ankle secured under armpit or by chest.
• Leverage: Hips used as fulcrum against knee. Arms control ankle preventing bending.
• Body Alignment: Body aligned with leg creating straight force line. Back arched, hips driven forward.

Force Application:

• Hyperextension: Primary force hyperextends knee by driving hips into knee while pulling ankle to chest.
• Direction: Opposing forces along leg length – forward hip pressure vs. backward ankle pull.

Key Principles:

• Leg isolation prevents escape
• Hip drive for power
• Secure ankle control
• Straight line force alignment

×

Bear Trap – Detailed Breakdown

Target:

Opponent’s lower leg (calf) for control and sweeping, not primarily for submission.

Positional Mechanics:

• Control: Legs entangle opponent’s calf, similar to cross ashi/saddle for thigh. Often from 50/50 or X-guard.
• Leverage: Legs create strong lock around calf, limiting mobility and setting up sweeps.
• Body Alignment: Body positioned to maintain tight entanglement, preventing escape.

Force Application:

• Compression/Control: Primary force compresses and controls lower leg, restricting movement.
• Sweeping Force: Creates base for sweeping using hips and body to off-balance opponent.
• Direction: Forces directed to control and restrict leg, creating off-balancing for sweeps.

Key Principles:

• Secure calf entanglement
• Positional control priority
• Sweeping potential
• Control over submission

×

Junny Lock – Detailed Breakdown

Target:

Knee joint, specifically rotational force for heel hook from outside position.

Unique Aspect:

Effective heel hook from outside position, challenging traditional understanding that inside position is necessary for safety.

Positional Mechanics:

• Control: Creates tension and control from outside position to generate rotational force. Precise hand placement on heel and foot.
• Leverage: Sophisticated body mechanics create breaking pressure without typical inside entanglement.
• Body Alignment: Specific hip angles and body weight distribution for unconventional leverage.

Force Application:

• Rotational Force: Similar to standard heel hook – rotational torque on knee by twisting heel while stabilizing knee.
• Leverage from Outside: Innovation in generating leverage from outside position.
• Direction: Rotational vectors targeting knee from unconventional starting point.

Key Principles:

• Unconventional entry point
• Highly precise control required
• Focus on breaking mechanics
• Advanced technique requiring experience