Study of the instruction effect using force plates and EMG in straight punching

Abstract

[Purpose]: This study compared differences between before and after instruction to determine instructional factors for beginners. [Subjects]: The subjects were 5 healthy adult males (31.2±1.2 years old) who had no experience of boxing. [Methods]: The subjects were requested to hit the target immediately after a light was flashed using right hand straight punches. We divided the punching-motion into four periods based on features quantified using two force platforms and electromyography (EMG), and derived the punch motion speed, the trajectory displacement of center of foot pressure (COP), and the muscle activities. The measurement items were compared for significant differences between before and after instruction. [Results]: After instruction, significant reductions were found in motion time, and of COP trajectory displacements in the posterior and right directions in the preparation period, as well increases in the muscle activities of five muscles. [Conclusion]: These results suggest that the straight-punching motion instruction given for boxing beginners guidance is effective.