The triangle choke: how it works and how to do it

Technique guideUpdated 25 Oct 2026

Our AI analyses your rolls. Free to try.

Try a free analysis

Download on theApp StoreGet it onGoogle Play

By Scott Flear, founder of JitsAI.

What is a triangle choke?

The triangle is the main choke you do with your legs in Brazilian jiu-jitsu. From closed guard you trap one of your opponent’s arms inside your legs, leave the other out, and lock your legs in a figure four around their neck and the trapped arm. It doesn’t use the gi, so it works the same in no-gi and MMA. In judo it’s sankaku jime; in Brazil, the triângulo.

It’s a blood choke, the same family as the rear naked choke. The arm triangle is the same idea done with your arms: in both, the opponent’s own shoulder becomes one wall of the choke (Hasegawa et al. 2026).

How does a triangle choke work?

Look at the triangle from the front. Your thigh is one side, their own shoulder is the other, and their throat sits in the gap between the two.

• Your thigh takes one side. The back of your thigh, near the knee crease, presses one side of the neck, over one carotid artery.
• Their shoulder takes the other. Pushing the trapped arm across jams their own shoulder into the other side of the neck (Hasegawa et al. 2026). That’s why you need one arm in: with no arm inside, there’s nothing on that side to squeeze against.
• The windpipe sits in the gap. Done right, the front of the neck is in the open space in the middle. Ear, nose and throat researchers class the triangle as a blood choke, not an air choke (Singerman et al. 2026).
• Blood flow, not a reflex, puts them out. Squeezing the carotids cuts blood flow to the brain. Researchers put the blackout down to that compression, not the carotid-sinus reflex (Mitchell et al. 2012; Nimura 2022).

So the triangle isn’t about leg strength. The angle and the arm across do the work. Square on, your thigh lands on the jaw and you’re squeezing bone, not arteries.

Two episodes from our Anatomy Series. Episode 17 explains why blood chokes like the triangle work in seconds and air chokes don’t. The season finale asks what stops you choking a much bigger animal: reach, not blood pressure.

How do you do a triangle choke?

This is the classic triangle from closed guard. The angle (step 4) and the arm across (step 6) are what make it a choke; leg strength comes last.

1. Step 1: Break their posture. Pull their head down and control their wrists. Nobody gets triangled sitting up tall.
2. Step 2: One arm in, one arm out. Push one of their arms back between your legs, or pull it into your belly, while the other stays outside. Both in or both out and there’s no choke.
3. Step 3: Leg over the neck. Put a foot on their hip, lift your hips and swing the leg on the side of their outside arm high across the back of their neck. The back of your thigh goes on the side of the neck, not on the shoulder blade.
4. Step 4: Cut the angle. Pivot your hips until your body is roughly at a right angle to theirs. That moves your thigh off the jaw and onto the side of the neck.
5. Step 5: Lock the figure four. Hold your shin and fold your other knee over your ankle, so the ankle sits in the crook of your knee. Don’t lock at the foot or hold your own toes: it’s loose, and it’s hard on your own knee.
6. Step 6: Push the arm across. Drive their trapped elbow across their body so their own shoulder packs into the side of their neck.
7. Step 7: Finish. Pull the head down, squeeze your knees together and lift your hips a little. Squeeze steadily, and let go the moment they tap or go limp.

Common triangle choke mistakes

• Staying square. Square to them, your thigh sits on the jaw. It hurts but it doesn’t choke. Cut the angle until the thigh is on the side of the neck.
• Both arms in, or both out. With both arms in they can stack you and pass; with both out there’s no second wall. One in, one out.
• Locking at the foot. An ankle resting on your shin, or a hand on your own toes, is a loose lock and strains your knee when they posture up. Lock behind the knee.
• Squeezing harder instead of fixing the angle. Leg strength won’t finish a bad angle. Get the angle and the arm across first, then squeeze.

When they defend the triangle by pulling the arm out, the same guard sets up the armbar. The kimura is the other big attack from closed guard.

What happens if you don’t tap to a triangle choke?

You go to sleep. Across 81 chokes in real fights, people went unconscious about 9 seconds on average once the choke was fully locked (95% confidence interval 8.3 to 9.9 seconds; Stellpflug et al. 2020). That figure covers chokes in general, not triangles alone.

Being choked out in training isn’t rare. In a self-reported survey of 4,307 grapplers, 27.8% said they’d been choked unconscious, and 2 people (0.05%) reported symptoms that didn’t go away (Stellpflug et al. 2020). That survey was self-selected, so treat the numbers as a rough picture. Serious injuries are rare, but they happen. One case series described 10 injuries from grappling chokes, including 5 carotid and 3 vertebral artery dissections, tears in the wall of a neck artery (Stellpflug et al. 2022).

The triangle can hurt the person doing it, too. In a survey of 1,140 grapplers, it caused 19 of the 66 injuries reported by people applying a submission, more than any other technique (Hinz et al. 2021). Lock behind the knee, not at the foot.

How to train the triangle choke safely

• Tap early. Tap when you feel the choke lock, not when you feel yourself going.
• Let go on the tap. Release straight away when your partner taps, or if they go limp or stop responding.
• Train under a qualified coach. Learn and drill chokes in a class, never as a game or a dare.
• Get checked if something’s wrong. Seek medical care if you have neck pain, a headache, or changes in your vision or speech after a choke.

Does your triangle land on everyone, or only on beginners?

Finishing a white belt and finishing a resisting blue belt are different results. JitsAI scores each technique against a nine-level ladder by partner size and experience, so you know who your triangle really works on.

• One Focus a week, with pinned lessons from Henrique Rezende’s 74-lesson fundamentals course.
• A nine-level ladder for every technique, from partners less experienced than you to more experienced ones, each split lighter, same weight and heavier.
• Land it once and it’s a hit; 3 wins across 2 sessions and it’s proven.

Take the free 2-minute quiz →

$1 for 7 days, then $39 a year.
iPhone and Android.

Sound on

1. 1Pick ONE thing One position for the week: an escape, a guard, a sweep.

2. 2Test it on everyone A quick check-in after class: who each round was against, and whether it worked.

3. 3Hit, then proven Land it once and it’s a HIT. Three across two sessions and it’s PROVEN.

4. 4Know what works See what holds up, against whom, then pick your next Focus.

Video transcripts