Mechanical Advantage

The americana pins the opponent's wrist to the mat and rotates the shoulder using both arms against one. Two arms versus one shoulder joint creates an overwhelming mechanical advantage.

Back control puts your four limbs against an opponent who can only reach behind them with limited range. The mechanical advantage of attacking from behind eliminates roughly half of your opponent's defensive tools.

Mount places your hips directly on the opponent's torso, using gravity and base to maintain position. The top player's weight acts through their centre of mass while the bottom player must bench-press to create space.

The heel hook attacks the knee ligaments by rotating the foot while the shin is controlled in two directions. Your entire body torques a joint with almost no muscular protection — mechanical advantage at its most extreme.

The D'arce threads your arm under the neck and through the armpit, using the opponent's own shoulder as compression. Squeezing your arms together and walking your hips generates a mechanical squeeze that tightens without needing raw grip strength.

The bow-and-arrow choke uses the lapel as a cable across the neck while you extend your body in the opposite direction. The distance between your pulling hand and extending legs creates a lever arm measured in feet.

The body triangle locks a figure-four around the torso, using your legs — the strongest muscles in your body — to compress the opponent's ribs and diaphragm. No amount of core strength resists sustained leg compression.

The kneebar hyperextends the knee by bridging your hips against the joint while controlling the ankle. Your hip bridge — one of the strongest human movements — versus a single joint creates decisive mechanical advantage.

The arm triangle uses the opponent's own trapped shoulder as one wall of the choke while your arm provides the other. Walking your hips in tightens the choke mechanically without requiring you to squeeze harder.

The crucifix traps both arms using your legs and body, leaving the opponent's neck completely undefended. Controlling two limbs with your legs frees both your hands to attack — a three-on-zero mechanical advantage.