As you can see, the training and procedure is not at all easy, on the contrary, it is obvious that the aspiring ninja will have to master in advance the other secrets of the martial arts, that is, the basic principles of Karate, Tae Kwon do, Jeet Kune do, etc...And even put all your effort into exercising from the tendons to the rest of the muscles, in the content of this book with all the dedication to be able to achieve the skill and strength necessary for this purpose.Finally, the following must be taken into account: The ninja never bragged. A karateka, Judoka, Aikiista, etc., should never show off.
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