Knee on Belly

Position
Also known as:
KOB

Knee on belly is the mobile pin: one knee planted across the opponent's torso, the other leg posted wide, your weight arriving through a single sharp point while you stay light enough to move instantly. Where side control smothers and mount settles, knee on belly provokes. It hurts, it scores, and above all it forces the bottom grappler to react, and the reactions are the attack.

Quick Reference

Key principles

  • · Drive your knee diagonally across the opponent's belly or solar plexus, projecting your weight downward through that single point of contact.
  • · Maintain a wide base with your posting foot far enough away to resist bridging and shrimping attempts.
  • · Grip the near-side collar and far-side hip or pants to anchor yourself and limit their escape angles.
  • · Stay on your toes with hips forward so your weight is oppressive rather than passively sitting.
  • · Anticipate the opponent pushing your knee or turning into you—use these reactions to transition to mount, armbar, or take the back.

Execution

  1. 1 From a top position such as side control or turtle top, step your near knee onto the opponent's midsection while your far foot posts wide on the mat for balance.
  2. 2 Secure grips—typically near-side collar with one hand and far-side hip or belt with the other—to stabilize and create a connected frame.
  3. 3 Rise up on your toes, drive your hips forward, and project downward pressure through the knee while keeping your posture tall.
  4. 4 Use the opponent's defensive reactions—pushing your knee, bridging, or turning—to transition to submissions like cross-collar choke, armbar, or advance to mount.
  5. 5 If they begin to escape, quickly backstep to side control or re-establish KOB on the other side to maintain dominance.

Common mistakes

  • × Placing the knee too high on the chest or too low on the hips, which reduces pressure and makes it easy for the bottom player to frame and escape.
  • × Sitting back on your heel instead of staying on the toes with hips driving forward, which removes oppressive pressure and allows the opponent to recover guard.
  • × Posting the base foot too close to the opponent's body, narrowing your base and making you vulnerable to being swept by a bridge or hip bump.

From the bottom

What the bottom grappler is working toward from Knee on Belly.

Hip Escape escape
5 less common
Deep Half Entry transition Elbow Escape escape Frame And Shrimp escape Shrimp Escape escape Technical Standup escape

On top

The top grappler's options against Knee on Belly.

Farside Armbar From Knee On Belly submission Knee On Belly To Mount transition
4 less common
Baseball Bat Choke submission Knee On Belly To North-South transition Nearside Armbar From Knee On Belly submission Inverted Armbar submission