Uchi Mata family analysis for Coaches and Teachers
  In this paper it is performed the biomechanical analysis of Uchi Mata family, the unifying vision of biomechanics let coaches and teachers to approach competition and lessons in different way. Uchi Mata and all throws that are in the biomechanical group of Couple applied by trunk - leg showed that these most effective techniques in high level competition, are in fact also energetically less expensive than those of the Lever group. The overview of the sportive judo books that show the different kind of Uchi Mata, for example, are in term of Biomechanics always the same movement. The Japanese different vision informed also the studies among the world that never analyzed the unifying vision. The complementary tools to increase the effectiveness are also analyzed and few New or Chaotic application of trunk-leg family. The Physical and biomechanical background is analyzed showing that these throws are also bio-mechanically simpler, relying only on closing the distance and apply Couple . GAI plus Couple. Their intrinsic simplicity, however, hides a different complexity from those of the Lever which, remember, they need a high motor coordination to be effective. In fact, being able to apply these techniques of Couple require a particular timing ability. 
Attilio Sacripanti
physics.pop-ph