The biomechanical analysis of contest sports competitions has given us some very important results: a) the motion of Couple of Athletes system is a Brownian generalized motion; b) interaction between athletes can be subdivided into two steps: the first is common to all contest sports (shortening of mutual distance ); the second step is peculiar to each sport. Ex. long distance sports: direct blows to sensible or conventional body points ; very short distance sport: tools for throwing the adversaries by two physical principles ; c) the kinetic energy of the athlete depends on oxygen consumption and the athlete's efficiency; d) The capability of changing velocity does not depend on friction; it is inversely proportional to the mass and directly dependent on oxygen consumption and efficiency; e) the variation time of velocity is dependent on the mass and inversely proportional to friction; f) the attack velocity at contact is given by square root of double of oxygen consumption multiplied by efficiency divided by body or limb mass; g) the measure of variation of push/pull force is related to the measure of the friction in direct proportion to oxygen consumption; h) the flight path of thrown athlete is a geodetic of three specified symmetry or their linear composition; i) the couples of forces techniques are independent of friction; it is possible to use them whatever the shifting velocity is; j)the physical lever techniques depend on friction ; that means it is possible to use them only for stopping the adversary; k)the techniques of couple of forces are energetically the best; l) among the techniques of physical lever, the maximum a m are energetically the best; m) attack frequency is directly proportional to impact velocity and indirectly to mutual distance; n) attack frequency is directly proportional to kinetic energy for time and inversely to mass and square of distance; o) the direct attack blow has a success probability of 66% compared to defence .
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