The effect of proposed changes for the rotation and throwing phases on some kinematics and performance variables for U20 weightlifters

Abstract

Weightlifters from the youth division of five clubs in the Najaf Governorate. The researcher divided the research sample into two groups (experimental and control), and the proposed changes in technical performance were applied to the members of the experimental group while traditional technical performance was applied to the members of the control group.The educational program, which consists of three educational units for each week for a period of four weeks, was put into practice after the pre-tests, which included the option of (shooting from full performance), and the results showed that there were significant differences between the two groups and in favor of the experimental group in the post-test of throwing from the full movement, which came in line with the researchers' hypothesis .In order to give the shooter the most explosive power possible and to achieve the best mechanical position by managing the pause period between the rotation and propulsion phases, he attributed the reason to the significance and impact of the proposed changes on the throwing distance for this competition.The traditional technical performance, which is in the form of bending at the start of rotation, rotation, then extension, and pushing, results in difficulty controlling the stopping period between the two phases (rotation and pushing), as well as less explosive power. This is achieved by using the instantaneous rapid bending and stretching method and without a long pause. In contrast to the suggested modification, the researcher suggested performing research on examples of discus effectiveness.