Sports Biomechanical Analysis of the Rear Straight Punch Technique among Female Sanda Athletes of Different Levels
To explore the differences and patterns in the rear straight punch technique among female Sanda athletes of different levels and identify the key factors influencing the punching effectiveness,this study collected kinematic and electromyographic(EMG)data from 20 athletes(10 elite-level and 10 first-class athletes)using the Codamotion and ME6000 surface electro-myography system.By analyzing indices such as joint angles,angular velocities,punching speeds,integrated EMG values,and muscle contribution rates,this study aimed to uncover the critical factors influencing punching effectiveness.Based on the results from the three-dimensional motion capture system and surface EMG measurements,the study revealed that elite-level athletes exhibited superior joint angles,angular velocities,and punching speeds at the initiation,completion,and recovery phases of the punch compared to first-class athletes.Furthermore,the anterior deltoid was identified as the primary muscle contributing to the rear straight punch,and elite-level athletes demonstrated higher contribution rates from trunk and lower limb muscle groups.This study elucidated the biomechanical characteristics of the rear straight punch technique,providing a scientific basis for optimizing training and emphasizing the importance of flexion-extension angles at the shoulder,knee,and ankle joints,as well as muscle coordination.
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