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Professor Gustavo Gasperin and Dr. Mike Piekarski, DPT analyze the dreaded position and give safety tips to avoid potential injuries.

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Professor Gustavo Gasperin and Dr. Mike Piekarski, DPT break down the kinematics of the Toehold submission.
This is video #2 of a video series explaining anatomically how leg lock submissions work.

“A toe hold submission attacks the ankle right, but how does it work? There are multiple joints working at the ankle complex, particularly the talocrural joint and the subtalar joint.

The talocrural joint allows the foot to lift up and push down (dorsiflexion and plantarflexion). This is the joint that is primarily targeted by an ankle lock.

The subtalar joint allows the foot to fold in and out (inversion and eversion). The toe hold submission targets both joints (talocrural and subtalar) simultaneously by folding the foot down and in (Combining plantarflexion and inversion). There are two ligaments that prevent this movement: anterior talofibular ligament and calcaneofibular ligament.

These are the same ligaments that are damaged from a typical rolled ankle (ankle sprain). Stay tuned for my next post differentiating a traditional ankle lock from an achilles compression.”

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Professor Gustavo Gasperin teaches how to escape the Straight Ankle Lock from the Ashi Garami position.

Here are 20 entries to the inside sankaku position for no-gi jiu-jitsu and submission grappling. The inside sankaku (inside triangle) position is perhaps the best position for finishing one of the most powerful submissions in all of grappling, the inside or “inverted” heel hook. Thank you very much to John Sanchez for helping with this video as well as my training partners at Veneration BJJ and 360 BJJ for putting me in positions everyday that force me to create new strategies. Also, a special thanks to my Brazilian jiu-jitsu professor, Dave Rosenmarkle as well as my other instructor, Scott Huston. I would also like to point out that while I have independently discovered potentially unique ways of achieving this position through empirical research, my approach to achieving (and even inspiration to achieve) this position is directly influenced by the groundbreaking work of the Renzo Gracie Academy, including Eddie Cummings, Garry Tonon, Gordon Ryan, and of course, John Danaher. Without the priceless knowledge they’ve given us through their matches, tutorials, and interviews, it is likely that few, if any of us in the jiu-jitsu community, would be attacking the lower body with as much technical proficiency, and for that, we all owe them a tremendous debt of gratitude.

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