A comparison of the dynamic characteristics of in situ arms-swinging vertical jumping and head-held vertical jumping

By using a 3D force measurement platform(Kistler) and an infrared light sport automatic capture system(Qualisys-MCU500),the authors run arms-swinging vertical jumping and head-held vertical jumping tests respectively on 9 layers in the men’s volleyball team of Beijing Sport University,and revealed the following findings: the maximum force measured in the process of arms-swinging vertical jumping and stretching was greater than the maximum force measured in the process of head-held vertical jumping,but the gradient of stretching force in the second half period did not increase significantly as a result of the extension of the second half period of stretching;the maximum ground impact force at landing was irrelevant to vertical jumping height;the impulse of arms-swinging vertical jumping was greater than the impulse of head-held vertical jumping,but from the research results it was found that there was no significant correlation between vertical jumping height and impulse.