| Research background:Weightlifting is a high-intensity competitive sport that requires athletes to have high physical,technical,and psychological qualities.In weightlifting competitions,the athlete’s competition ability is directly reflected in the success rate of the athlete’s lift.As the last competitive event in weightlifting competitions and the one with the highest weight limit,the clean and jerk’s results play a decisive role in most cases in determining the athlete’s ranking.Therefore,the clean and jerk’s technique,as an essential guarantee for the success rate of the clean and jerk,is a key technique in weightlifting and one of the important indicators for measuring athletes’ strength.This article aims to study the clean and jerk technique of Chinese male weightlifters to serve the preparation for the new Olympic periodization.The study selected clean and jerk competition videos for research and analysis.Research objectives:(1)To help Chinese athletes better grasp and apply the clean and jerk technique and improve their competitive level in the new Olympic cycle;(2)To help coaches and athletes better understand and master the technical rules of the movement and optimize the training methods;(3)To help practitioners and enthusiasts better understand the essence and rules of the clean and jerk and improve training effectiveness,promoting innovation and development of weightlifting in theory and practice.Research methods:Research subjects: The top three athletes in the clean and jerk competition in three levels of weight categories that are most competitive internationally in China’s 2022 National Weightlifting Championships: the Olympic participation levels of 61 kg,73 kg,and 89 kg.Testing method: Using Kinovea motion video analysis software to analyze and record each clean and jerk’s critical parameters and motion status of the top three male athletes in the 61 kg,73 kg,and 89 kg weight categories in the 2022 National Weightlifting Championships,and analyze the data obtained in combination with the concept of weightlifting technique.Research results:(1)The technical movements of the top three male athletes in the clean and jerk in the three Olympic participation levels in the 2022 National Weightlifting Championships are generally standardized,but there are also phenomena such as inconsistence and inappropriate movement;(2)The success rate of the clean and jerk is relatively low,and among all Olympic participation levels,the 89 kg level has the highest success rate,reaching 77.78%.However,the 89 kg level has the highest average Sinclair coefficient of 230.56 among all Olympic participation levels.The 61 kg level has the lowest success rate,with only55.56%.However,the 61 kg level has the highest average Sinclair coefficient of 238.58 among all Olympic participation levels.Research conclusion:(1)The more stable the athlete’s clean and jerk technique level is,the higher the success rate of the lift.(2)The technical movements of the top three male athletes in the clean and jerk in the three Olympic participation levels in the 2022 National Weightlifting Championships are generally standardized,but there are also phenomena such as inconsistent depths of the preliminary squat,deviation of the preliminary squat force line direction,insufficient upward force and deviation of the upward force direction,significant rebound and center of gravity deviation in the bell support,and front and back drops in the support;And these problems should be solved by specific improvement measures.The mainstream techniques for the preliminary squat include stable rhythm,reasonable depth,and vertical direction without deviation.The mainstream techniques for the upward force include rapid and sufficient upward force,vertical upward force line,and no pause in the connection between the preliminary squat and the upward force,and the movement is coherent.The mainstream techniques for the bell support include a stable vertical center of gravity,no significant deviation in the barbell’s horizontal direction,small rebound in the barbell’s drop,and stable elbow. |
