There are 3 main neck attacks in grappling:
– Cranks, that bend and twist the neck like any other joint.
– Air Chokes that compress the windpipe and reduce airflow.
– And Blood Strangles that compress the carotid arteries disrupting blood circulation to the brain.
According to Spitz and Fisher’s book: Medicolegal Investigation of Death, on average, 32 pounds per square inch of pressure are required to block the airway, while only 4.9 pounds per square inch suffice to occlude the carotid arteries and jugular veins. That’s 6 times less.
On an episode of the Sports Science tv series that featured Pride Heavyweight Champion Fedor Emelianenko, they measured his squeezing force when applying what is considered the most effective strangle… the rear naked choke.
He scored 500 pounds of force…
Using an estimate of 10 square inches of contact area, we get 50 pounds per square inch of pressure. That’s 10 times what’s needed to choke someone unconscious with a blood strangle.
A strong neck will help you defending certain neck attacks, specially when not properly executed, but unless you can make your neck 10 times stronger than the average human, your chances of escaping one of the Last Emperor’s rear naked chokes are very slim.
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