Judo: how to enhance tactics in competition, biomechanics of combination   and action reaction
  This paper is an ideal continuation of the previous one - How to enhance effectiveness of Direct Attack Judo throws -in it there are analyzed the two following parts of Judo tactics in high level competitions: combination, and action-reaction. The paper start with a review of the Japanese approach to Initiative ( Sen) and follows by the biomechanical view of the same subject. High level competitions are the main argument not only of coaches match analysis , but also of a lot of scientific researches. However the connection between these two field that analyze the same subject is very hard . A lot of information are not easily transfer to coaching area. In this paper the effort to give coaching useful information is the primary aspect also at detriment of some formal mechanical information. After a new Operative Classification of throwing techniques , the biomechanical analysis of combination and action-reaction tricks flows in easy way singling out some interesting finding, useful for coaches. With this effort the biomechanical analysis of judo Interaction in high level competition could be considered completed 
Attilio Sacripanti
physics.pop-ph