The principle of localized force: The central feature of jiu jitsu is to use advantage to control greater strength and aggression with less. How is this possible? It is done largely through the principle of localized force. Let's say we have an opponent who can apply an average of one hundred units of strength in standard strength tests while we can only generate 50 units of strength. As a whole, he is roughly twice as strong as us overall. How is victory through grappling possible in such a case? The key is to that it is possible to use a very high percentage of our overall strength to attack a small percentage of my opponents overall strength at a point of his body which, if attacked successfully, will end his ability to continue the fight. If I can use the various movements of jiu jitsu to maneuver into a position where I can create a temporary LOCAL strength advantage at a critical point of my opponents body (neck or joints), I can overcome an OVERALL strength disadvantage. The whole basis of our sport is precisely to develop the skill of maneuvering into these local advantages as efficiently as possible and using that to create a threat to a critical but vulnerable body part in a way that leads to submission. A good example would be ashi garami, where a very high percentage of our overall strength – legs, both , back and both arms are used to restrain an opponent's and hip in a way that allows us to threaten severe damage. If a good ashi garami allows us to use 90% of our 50 units of strength against an opponent's single leg, 33% of his 100 units of strength, then we shall have a considerable local strength advantage on an opponent twice as strong as ourselves overall. This is one of the core principles of our sport and one which we must constantly keep in mind as we and develop. Here, Gordon Ryan uses a high percentage of his total strength on the isolated leg of his opponent through a variation of ashi garami, creating a local advantage long enough to threaten a break and get a submission on his way to victory at EBI 8

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