Head and arm choke from mount (arm triangle) - Lachlan Giles
0
S-Mount Arm Triangle Transition·Absolute MMA St Kilda - Melbourne
Check out http://lachlangiles.net for more instructionals
Translation: Shoulder Hold / Head-and-Arm Choke — S-Mount
Range & classification
Category
Strike & defenceLocksClose rangeFighting multiple people
Distance
CloseMiddleLong
Body target
Upper bodyMiddle bodyLower body
Overview
An arm triangle variation applied from S-Mount. The attacker raises one knee high beside the opponent’s head and swings the other knee across their chest, creating the “S” shape. This tightens control over the head-and-arm while giving greater downward pressure. The attacker may finish directly from S-Mount or transition to side control while maintaining the choke for increased tightness.
History & Origin
Adapted from classical Kata Gatame; refined in Brazilian Jiu-Jitsu as an advanced mount submission. The S-Mount adjustment was popularized for creating maximum chest pressure while limiting opponent’s defensive options.
Country of origin· shown in random order
- BrazilBJJ, Submission Grappling, MMA
- Japan肩固め（Sマウント）(Kata Gatame — S-Mount)BJJ, Judo, Submission Grappling
- USASubmission Grappling, MMA
Effectiveness
The S-mount provides extreme positional control that isolates the arm and restricts defensive movement, creating a high-percentage entry to the arm triangle with minimal escape opportunities. [1]
Lineage
The S-mount to arm triangle transition was developed in BJJ as an advanced mount attack, using the S-mount to isolate the arm before transitioning. [1]
Competition Record
S-mount arm triangle transitions appear at high-level BJJ competition. [1]
Images
No images yet for this technique.
Sign in to suggest an image.
Biomechanical Mechanism
Action — Shoulder and trapped-arm compression of the carotids with chest/hip weight angled from S-Mount
Joints Affected — Neck (carotid arteries), shoulder (secondary)
Torque Direction — Downward diagonal pressure from chest and shoulder with lateral squeeze
Position & Entry
From mount, drive one knee high under opponent’s armpit, slide other knee across torso into S-Mount. Thread opponent’s arm across their neck, drop head and shoulder to the mat, and lock head-and-arm grip. Finish by squeezing from S-Mount or slide off to side control to increase angle.
Variants
Direct S-Mount finish
S-Mount to Side Arm Triangle
S-Mount to Back Take if opponent rolls
Videos
1 video
Learn This Technique
No instructional courses yet for this technique.
Sign in to suggest a course.
Ratings
Risk of injury to the person this technique is applied to
9
Extreme9/10
Direct vascular choke with strong positional control; difficult for defender to bridge or escape due to high mount.
Skill level needed to execute this technique reliably
Intermediate
Whether this technique is allowed under major competition rule sets
Illegal
FIAS Sport Sambo— no chokes in sport sambo, FIAS Rules 2024
Legal
IBJJFIJFUnified MMAADCC
Training Notes
✓Keep weight centered; do not lean too far forward or you risk losing balance. Control opponent’s far arm to prevent bridging. Drive chest down and squeeze with gradual shoulder pressure rather than arm strength.
Common Mistakes
!Not securing high knee position before setting the choke
!Letting the opponent’s elbow escape from across the neck
!Overcommitting chest forward and getting swept
!Attempting to squeeze with arms only
Related Techniques
Counter Techniques
Tuck Chin — protect the neck by lowering the chin to prevent the choke from sinkingTwo-on-One Grip Fight — use both hands to strip the choking grip before it locksTurn Into — rotate toward the choking arm to relieve carotid pressurePosture Up — straighten the spine and create distance to break the choking angle
Setup Chain
1Achieve Controlling Position — secure the position from which the choke is applied
2Isolate the Neck — clear defending hands and establish access to the throat
3Set the Grip — lock the choking configuration (arm, lapel, or leg placement)
4Apply Pressure — squeeze to compress the carotid arteries for the finish
Sources & References
Primary Source
Kodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
1BookKodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Japanese terminology sourced from Kodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Official Kodokan ground technique classification system
3OtherJapanese Martial Arts Standard Terminology (武道用語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
4CitationKodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Japanese terminology sourced from Kodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Community
Athletics
Requires
hip flexibility, long legs relative to torso
Favours
longer limbs for easier figure-four lock around head and arm
Key muscles
hip adductors, hamstrings, quadriceps
Notes
Often used when the opponent defends standard mount arm triangle by framing or bridging—S-Mount changes the angle, making defense harder.
Frequently Asked Questions
How should I position my arm and weight when applying the arm triangle from S-mount?
Place your bicep across the opponent's chest with your hand positioned low, then apply pressure by driving your weight from bottom to top rather than pushing down from the face. This upward pressure allows you to slip past a tucked chin and land on the neck more effectively.
What's the key difference between using arm strength versus body weight for this choke?
You want your body weight sprawling with your elbow kept low to be the main mechanism of the choke, not arm squeezing. If your elbow lifts or your hips come too high, you'll lose pressure on the neck.
How do I prevent my opponent from escaping by rolling away?
Put your hands together underneath the opponent's shoulder blade to keep them from rolling flat and facing away, which would make the choke impossible. You can also maintain control by staying low with your shoulder and head positioned as a tripod against their body.
Where exactly should my elbow be positioned to execute the choke effectively?
Keep your elbow jammed into the opponent's neck and make sure your hand and shoulder are both lower than the line of their head so your bicep lands across the neck when you sprawl down.
How does the S-Mount Arm Triangle Transition work?
An arm triangle variation applied from S-Mount. The attacker raises one knee high beside the opponent’s head and swings the other knee across their chest, creating the “S” shape.
Where does the S-Mount Arm Triangle Transition come from?
Adapted from classical Kata Gatame; refined in Brazilian Jiu-Jitsu as an advanced mount submission. The S-Mount adjustment was popularized for creating maximum chest pressure while limiting opponent’s defensive options.
How dangerous is the S-Mount Arm Triangle Transition?
Danger rating 9/10. Direct vascular choke with strong positional control; difficult for defender to bridge or escape due to high mount.
How do I set up the S-Mount Arm Triangle Transition?
The standard setup chain: Achieve Controlling Position → Isolate the Neck → Set the Grip → Apply Pressure.
How do I defend against the S-Mount Arm Triangle Transition?
Standard counters include: Tuck Chin — protect the neck by lowering the chin to prevent the choke from sinking / Two-on-One Grip Fight — use both hands to strip the choking grip before it locks / Turn Into — rotate toward the choking arm to relieve carotid pressure / Posture Up — straighten the spine and create distance to break the choking angle.
What are the variants of the S-Mount Arm Triangle Transition?
Common variants: Direct S-Mount finish; S-Mount to Side Arm Triangle; S-Mount to Back Take if opponent rolls.
How effective is the S-Mount Arm Triangle Transition in competition?
S-mount arm triangle transitions appear at high-level BJJ competition.
What are common mistakes when doing the S-Mount Arm Triangle Transition?
Top errors to watch for: Not securing high knee position before setting the choke / Letting the opponent’s elbow escape from across the neck / Overcommitting chest forward and getting swept / Attempting to squeeze with arms only.
What are other names for the S-Mount Arm Triangle Transition?
The S-Mount Arm Triangle Transition is also known as Kata Gatame — S-Mount, S-Mount Kata Gatame, S-Mount Arm Triangle, High-Mount Head-and-Arm Choke.