Individual technical mastery is fundamental for competitive success in the sport disciplines that imply specific routines being executed and scored. The study analyzes the ways to apply a set of biomechanical indices for the technical mastery rating purposes, with the Tkachev reverse hecht video captures taken for the case study and analyses. The biomechanical indices were quantified by the video material analyses with a special priority to the rotation elements of the vaulting movement sequence. The study data demonstrate that the countermove element in the Tkachev reverse hecht is pivotal for the required rotation impulse in the controlled over-bar aerial phase of the movement sequence. The countermove direction is opposite to the body mass center (BMC) radius-vector rotation in the contact phase, particularly in the starting-point (throw) phase. Since the aerial-phase body rotation axis goes via the BMC and the kinematic moment of the biomechanical system versus the BMC (-104 kgm2/s) stays constant, the extension-flexion joint movements in the aerial phase help only vary the angular speeds of the body elements causing no effect on the kinematic moment of the biomechanical system versus the body mass center.
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