Knee-on-Belly
Position · Side Control
He turned in to you, so you rise to knee-on-belly: your shin lies across his stomach with the knee near his far hip, toes on the mat, and the other leg posted wide behind, your hips up. One hand holds his far collar or near lapel, the other his near sleeve or belt. The shin pins him while you stay light and mobile, ready to follow his escape rather than lying on him. If he pushes your knee with his arm, the Armbar from KOB; if he turns in to you, the Baseball Bat Choke; if he turns away from the knee, follow him to the back. He wants to shrimp away and slide a knee in front of your shin; the detail beginners miss is keeping the posted leg wide and the hips over the knee, so that a push does not tip you over.
How to do it
- From side control, put your shin across their belly. The shin runs just under the belt, parallel to it, and the knee points at their far hip.
- Post the other leg out wide, the foot flat on the mat and the knee off the ground. This leg is your base and carries most of your weight.
- Grip the far collar and the near pants. The collar grip pulls their upper body up into your knee, and the pants grip stops their hips from turning in.
- Stay upright, with the weight going through the knee and not through your hands. Keep the hips over the knee so you can shift weight between the knee and the posted foot.
- Stay light and ride their movements. When they bridge or shrimp, follow with the knee and the posted leg rather than resisting, keeping the knee on the belly.
Key details
- Stay mobile, not heavy. Knee on belly works by reacting to their escape, and dead weight on the knee makes you slow to follow.
- Post the far leg wide for balance. A wide post keeps you on top when they bridge into you.
- Grip the far collar and the near pants. The two grips let you steer their upper body and hips separately.
- The shin runs just under the belt, parallel to it, the knee pointing at their far hip. Placed this way the shin covers the belly without sliding off onto the ribs or the hips.
- Stay upright: the weight goes through the knee, not through your hands. Leaning on your hands takes the pressure off the belly and gives them your arms to attack.
Common mistakes
- Kneeling on the ribs with all your weight. — It hurts, but with all the weight on one knee you lose balance as soon as they move. — Put the weight on the posted leg and keep the knee light on the belly.
- Posting the other foot too close. — A close post gives a narrow base, and they bump you off easily. — Post the far foot wide for a stable base.
- No grips on the gi. — Without grips nothing holds them, and they slip out under your knee. — Grip the far collar and the near pants to steer them.
If they defend
- They push your knee. → The pushing arm is straight: armbar from knee-on-belly.
- They turn into you. → Two collar grips and the baseball bat choke.
How to drill it
Knee-on-belly switches side to side, 1-minute rounds; then the partner pushes and you react.
Safety
Keep the knee on the belly, not on the ribs or the sternum.
What comes next
Where it comes from