Boston Crab

Submission · Turtle

A spine lock from wrestling shows: both of his legs are bent back over his own lower back. It appears when he lies flat on his belly with straight legs and gives you his legs. Standing over him facing his feet, trap both ankles under your arms with your forearms around his lower legs, then step over and sit on his lower back: the sit pulls the legs up and back and bends the spine. It is banned in BJJ competition, and in training it is never applied. The real lesson is defensive: never lie flat with straight legs. He escapes by bending his knees, which gives you the back, or by turning over, which lands you in side control. A spine lock: banned under IBJJF at all belts, never apply it in training.

How to do it

  1. They lie flat on the belly with the legs straight: the legs are given away and there is no base to turn.
  2. Stand over them facing their legs, your feet on either side of their body.
  3. Pick up both ankles and trap them under your arms, your forearms wrapped around the lower legs.
  4. Step over to sit on their lower back, keeping the legs clamped under your arms.
  5. The finish bends the spine: sitting down pulls the legs up and back over their own back. Never apply it in training.

Key details

  • A spine lock from wrestling shows: the lever is the legs bent back over the lower back.
  • Banned in BJJ competition.
  • Know it so you never give your legs from the belly: flat with straight legs, you hand them over.

Common mistakes

  • Sitting back hard. — Sitting back bends the spine and injures it. — Do not finish it.
  • Using it where it is banned. — In IBJJF it is an instant disqualification. — Take the back instead.
  • As the bottom player: lying flat on the belly with straight legs. — It gives the legs away. — Get to your knees or turn.

How to drill it

No drill for the finish. Drill turning a flat opponent to the back instead.

Safety

A spine lock: banned in IBJJF at all belts. Never apply in training.

What comes next

  • Back Control
  • Side Control
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