Guard Theory

Back Control Intermediate · Gi and no-gi

Body triangle versus hooks on the back

A body triangle holds the back by closing a ring of legs around the waist, which stops the hook-peeling escape but commits both legs, invites a counter on your own ankle and still depends on the chest.

Position and problem

You have their back with both hooks in, and they keep prying the bottom hook off with a hand and sitting toward the mat. Each time you put it back they have turned a little further, and after a few exchanges your chest is sliding off their shoulder. So you change the legs. One shin goes across their stomach, the knee of the other leg folds over your own ankle, and the prying stops because there is no single hook left to pry. This is the body triangle. It stops the prying, but their hips can still bend and shuffle inside the ring, both of your legs are now committed to one shape, and the locked ankle has become something they can attack.

Objective

Close a figure-four of the legs low around their waist so that their hips cannot turn out from under you, while the chest and the seat belt keep their shoulders from turning.

Core concept

Hooks hold the hips from the inside; a body triangle holds the whole waist from the outside. Two hooks sit in the crease of each hip and stop the legs from moving freely, and they can be removed one at a time, which is what a defender does by peeling the lower hook and sitting down. A triangle closes the legs into a single ring around the torso. To escape it the defender has to rotate inside the ring or open it, and there is no one piece that can be taken off by hand. That is why the triangle tends to hold up against hook-stripping better than hooks do, and why people who lose the back to hook-stripping often move to it. It does not stop a turn, and the ring can still be turned into. It has costs that hooks do not. The ring commits both legs to one shape, so it follows a person who stands or scrambles poorly, and a person on their knees can walk out of it more easily than out of hooks that move with them. It is also asymmetric. One leg crosses their stomach and the other closes over its foot, so one side of their body is held by a thigh and the other by a knee folded over an ankle, and the two sides do not resist a turn equally. Which leg goes on top is a choice to settle with your coach and to test against a partner who turns both ways. The fall-side rule for the seat belt still holds, because the triangle holds the hips and the chest still holds the shoulders. Compression is a side effect. A triangle squeezed hard does hurt, and some people tap to it, but squeezing tires the legs quickly and the control comes from the ring being closed rather than from how hard it is closed.

Key mechanics

  1. Lock the ring low, on the soft part of the waist between the bottom of the ribs and the top of the hip bones. Higher, it rides on ribs that compress and slide; lower, it sits on the pelvis and slips down as they sit toward the mat.
  2. Fold the knee of the top leg over the ankle of the crossing leg, close to the joint. A lock made over the toes can be pried open by hand, and a lock made over the shin leaves the ring loose enough to turn inside.
  3. Keep the seat belt and the chest on their upper back before anything else. The legs control the hips and nothing more, so a chest that drifts off the shoulder line lets them turn their shoulders to the mat while the ring stays closed.
  4. Hold the legs closed and heavy rather than squeezing, and tighten only in answer to a movement. A constant squeeze spends the legs on nothing, and the tightening then has nothing left when they turn.
  5. Watch their free leg. When they lift a leg and lay it across your locked ankle, open the lock and close it again with the other leg on top, or switch to hooks, before their weight settles, because their leg pressing down on your foot turns your own figure-four into a lever on your ankle.
  6. Open the triangle and put hooks in when they reach their knees or feet. The ring holds a person who is sitting or lying against you; it does not travel with a body that is getting up.
  7. Let the ring free your attention for the hand fight. With the hips held, both of your arms can go to the strangle and the wrist-fighting that defends it, instead of one arm propping up a failing hook.

Common errors

  • Locking the triangle around the ribs, which hurts their breathing but lets the hips slide out underneath it.
  • Relying on the legs while the chest comes off their back, so the shoulders reach the mat inside a ring that is still closed.
  • Crossing the ankles in place of folding a knee over one, which gives the defender two feet to trap and no real lock to open.
  • Squeezing continuously in the hope of a tap, which fatigues the legs and adds no control.
  • Keeping the triangle closed while they come up to their knees, so they walk forward out of a ring that cannot move with them.
  • Leaving the locked foot where their free leg can cross over it, so the counter lands before you notice it.

Safety

A tightened body triangle closes on ribs and a diaphragm that are trying to breathe, and some partners tap to it as a submission, so build any squeeze slowly and open the legs completely on a tap. The attacker's ankle is at risk too. When the defender lays a leg across the locked foot and presses down, the figure-four levers against the ankle of the crossing leg, so check the event's rules for your division before you train that counter. In training the attacker opens the lock as soon as the defender's leg lands on the foot rather than holding on to see whether it hurts, and the defender presses slowly. When a defender rolls to escape, the closed ring keeps both bodies joined through the roll, and heads and necks meet the mat together, so both partners slow down and the attacker lets the legs open if the roll goes over the head.

Training progression

  1. Static: partner sits in front of you. Lock the triangle at the waist, then move it up onto the ribs and down onto the hips, and have the partner tell you where they can breathe and where they can bend.
  2. Cooperative: partner turns slowly, first to one side and then the other, while you keep the chest attached and change nothing in the legs. Note which side the ring resists and which it gives up.
  3. Cooperative: partner lifts a leg across your locked ankle on each repetition. Open and close the lock with the other leg on top, or switch to hooks, before their weight settles on your foot.
  4. Constrained: partner may only try to stand or to turn to face you, and you may only hold, with no strangle. Switch to hooks the moment they reach their knees.
  5. Positional: start from the seat belt and a closed triangle, strangles allowed, the defender using every escape including the ankle counter where your room allows it. Restart on escape or finish.
  6. Live rounds: once the triangle is locked, take both hands to the strangle and the wrist fight rather than holding the ring and waiting.

Written material cannot correct your positioning, feel your pressure or stop a submission in time. Everything here is intended to make training with a qualified coach more useful, never to replace it.

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