The purpose of the study is to investigate the potential for altering the physical fitness indicators of hammer throwers when performing rotational motor actions in training under conditions of vertical elastic connection (VEC). Research methods and organization. High-speed spatial video cyclography, dynamography, pedagogical experiments, and methods of mathematical statistics were used. The research was conducted in China over a period of 4 months with hammer throwers predominantly of the 2nd sports category. Research results and conclusions. It has been demonstrated that it is possible to achieve targeted changes in the physical fitness indicators of athletes, particularly in the preferential development of speed and speed-strength qualities in throwers, with a predominant increase in speed-strength indicators. In attempts to throw the hammer, shortly after training sessions involving vertical elastic connection, it was shown that the release speed of the hammer significantly increased, the angular velocity of the hammer's rotation increased, while the angle of release of the hammer remained unchanged.
Sun et al. (Mon,) studied this question.