Changes in cross-punch speed and torso motion associated with round progression in amateur boxers
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Abstract
The aim of this study was to examine changes in cross-punch speed and trunk motion associated with the progression of rounds in amateur boxing athletes. We included 11 male amateur boxers (height: 167.3 ± 3.8 cm, weight: 65.3 ± 10.1 kg). Cross-punch performance was assessed before and after a 3-minute maximal-effort punching test, based on a previous study by Dunn et al. (2019). Performance was evaluated using an optical three-dimensional motion-capture system, with measurements conducted four times: once under a baseline condition (Pre) and three times under post-test conditions (Post1–Post3). No significant changes in punch speed were observed from Pre to Post1–Post3. The negative values of lower and upper torso axial-rotation angular velocities (rotation opposite to the punching direction) were significantly higher in Post1–Post3 than in Pre. The negative values of torso separation angular velocity and angle (upper torso twisting relative to the lower torso) were significantly higher than Pre in Post1–Post3 for angular velocity and in Post3 for angle. These findings suggest that rapid countermovement of the lower and upper torso and torso separation play an important role in maintaining high punch speed even with increased progression of rounds.
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