Belly Down Back Mount

What This Is

Belly down back mount is the position that results when an opponent in the seated back position (seatbelt or body triangle) attempts to escape by rolling face-down to the mat. Rather than following them and re-establishing seated back control, the attacker embraces the prone position: they remain on the opponent’s back, chest to back, both players face down, maintaining leg hooks or leg control across the opponent’s hips and legs.

This position is a convergence point between back control and the leg entanglement system. In seated back control, the primary submission is the rear naked choke. In belly down back mount, the primary submissions are heel hooks — specifically the outside heel hook, which becomes directly accessible when the opponent is prone and the attacker’s leg is across the opponent’s hip in the correct position. The position also creates immediate entry to cross ashi garami when the opponent rolls in either direction to escape.

Belly down back mount requires familiarity with the leg entanglement system. The submissions from this position — outside heel hook, inside heel hook, cross ashi entries — are elevated safety tier techniques. Practitioners should have a solid foundation in the leg entanglement attack system before pursuing this position in live training.

The position has been developed and refined in high-level no-gi submission grappling, most prominently in the back attack systems associated with Gordon Ryan and Danaher’s documented back control framework. It represents the convergence of two attack systems — back control and leg locks — into one positional structure.

Safety

The Invariable in Action

Belly down back mount is maintained by leg control across the opponent’s hips — the attacker’s legs are hooked across the opponent’s hips or inside the opponent’s legs, preventing the opponent from rolling further and creating the positional base from which heel hook entries occur. Losing this leg connection loses the position entirely — the opponent can simply roll away and recover base. The leg connection is more important to maintain than the upper body connection in this position: the legs are what keep the attacker on the opponent’s back when both are prone.

From belly down back mount, heel hook access is direct: the attacker’s leg position across the opponent’s hips places the opponent’s heel in reach. The rotation required for the heel hook is applied by the attacker’s arm controlling the heel while their body provides the rotational lever. The heel hook from this position follows the same mechanics as from dedicated leg entanglement positions — rotation, not force.

Entering This Position

From Seatbelt Back Control — Opponent Rolls Prone

The standard entry. From seatbelt back control with the attacker seated behind the opponent, the opponent attempts to escape by rolling face-down. The instinctive reaction is to follow them back to seated. The better response is to accept the prone position: as the opponent rolls forward, the attacker moves with them, maintaining the seatbelt or releasing it to establish leg control across the opponent’s hips. The attacker ends up chest-to-back with the opponent in a prone position.

From Body Triangle Back Control

The same roll-escape entry applies from body triangle back control. When the opponent rolls prone from body triangle, the attacker’s legs are already across the opponent’s hips in a triangle — this leg position translates naturally into the belly down back mount leg control and can immediately threaten a heel hook on the leg that the triangle is covering.

From This Position

Outside Heel Hook (SUB-LE-OHH)

The primary submission from belly down back mount. The attacker’s leg position across the opponent’s hips places the outside of the opponent’s near leg accessible for heel hook entry. The attacker reaches under the opponent’s leg, hooks the heel with the arm, and applies the outside heel hook rotation — turning the heel away from the midline, loading the knee’s lateral ligaments. From belly down, the attacker’s body provides the rotational base without the opponent being able to generate much counter-rotation while prone.

Inside Heel Hook (SUB-LE-IHH)

Available depending on the leg configuration at the time of entry. If the attacker’s inside leg is across the opponent’s hips (rather than the outside leg), the inside heel hook is the direct threat. The inside heel hook from belly down back mount requires the attacker to rotate their body slightly to create the correct angle. It is faster-acting and more dangerous than the outside heel hook — tap immediately when the arm wraps the heel from this position.

Cross Ashi Garami Entry (POS-LE-CROSS-ASHI)

When the opponent rolls to escape belly down back mount — rolling away from the attacker’s control — the attacker can use the rolling momentum to enter cross ashi garami (the saddle / honey hole). The entry occurs as the opponent’s legs separate during the roll. Cross ashi is one of the most submission-rich positions in the leg entanglement system, so this transition makes belly down back mount a gateway to that system.

Rear Naked Choke (SUB-BACK-RNC)

If the seatbelt or upper body connection is maintained as the opponent rolls prone, the RNC remains available. Some opponents, focused on the leg control, forget about the upper body threat. The attacker can switch from the leg hook entries to the RNC when the opponent’s defence is focused entirely on their legs.

Common Errors — and Why They Fail

Error: Chasing back to seated position when the opponent rolls prone. Why it fails: Following the opponent back to seated when they roll prone is the expected response — and the one the opponent is attempting to use to create a scramble. Accepting the prone position instead keeps the back control and opens the leg attack system. Correction: When the opponent rolls prone, move with them to belly down back mount rather than chasing the seated position. Practise this transition until the response is automatic.

Error: Losing leg control as the opponent becomes prone. Why it fails: The transition from seated to prone back control is the moment when leg control must be actively maintained or re-established. A top player focused on the upper body loses the leg hooks, and the opponent can walk their legs out and stand up. Correction: As the opponent rolls prone, prioritise maintaining at least one leg hook across the opponent’s hips. Upper body position is secondary during the transition.

Error: Applying heel hook force rather than rotation. Why it fails: Heel hooks are rotational attacks, not pulling attacks. Pulling the heel toward the body is a straight-line force that does not load the knee correctly and does not produce the submission. Correction: Rotate the heel away from the midline (outside heel hook) or toward the midline (inside heel hook). The arm wraps the heel and rotates — does not pull.

Drilling Notes

Prerequisites

Belly down back mount requires: (1) solid seated back control mechanics — the position is only available from seated back control; (2) heel hook safety awareness — the ability to apply rotational pressure gradually and to recognise a tap under unusual positional constraints. Practitioners without these prerequisites should not drill the submission entries from this position in live training.

Systematic Approach

Phase 1 — Transition drill (cooperative). From seatbelt back control, partner rolls prone slowly. Top player practises the transition to belly down back mount — maintaining leg control, settling into the prone position. No submissions. Ten reps. Goal: automatic positional transition.

Phase 2 — Heel hook mechanics (cooperative, no pressure). From belly down back mount, practise the heel hook entry — arm wrapping the heel, grip established — without applying rotational pressure. Confirm the heel is in the correct position. Practise the rotation direction with minimal force. Partner communicates throughout. Ten reps each configuration.

Phase 3 — Cross ashi entry from roll. As partner begins to roll away to escape belly down, top player practises the cross ashi entry using the rolling momentum. This transition requires reading the roll early — drill the recognition timing separately before adding the full entry.

Ability Level Guidance

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