CORRECTION OF THE TECHNIQUE OF MOTIONAL ACTION ON THE EXAMPLE OF WEIGHTLIFTING EXERCISE “CLEAN AND JERK”
Article is about correction of the technique of weightlifting «clean and jerk» exercise which is based on biomechanical parameters. Special technical complex was used for its registration which was formed at the laboratory of the chair of biomechanics and information technology of Moscow State Academy of Physical Education, which includes tensodynamometric platform, goniometer, amplifier, analog-digital converter, video camera and computer with special software. With the help of the formed technical complex, we carried out the assessment and correction of «clean and jerk» weightlifting technique based on registered biomechanical parameters. During registration of biomechanical indicators in clean and jerk we were focusing on next phases: «the moment of separation of the barbell from the platform», «preliminary racing», «final racing», «off-balance jump», «squat», «half squat with active braking», «expulsion», because only during these phases correction of clean and jerk technique is possible. Also, interrelation between indicators of tensodynamometry and goniometry were found as a result of our research. A couple of biomechanical indicators found out (knee flexion angle and vertical component of the support reaction) which has high correlation coefficient (0,79-0,76 by absolute value, depending on the relative weight of the burden). This has allowed us to choose the most rational biomechanical indicators for correction of technique of clean and jerk. We took into account the results of the completion of subjects for the assessment of application efficiency of the correction of the technique of motional actions, and also appropriateness of inclusion in the training process that technical process developed by us. It was found during our scientific research that the average increase of the weight of the projectile in the performed control exercise in the experimental group was higher than in the control group by 2,9 %.