The Protective Effect on Lower Limbs in Landing with Three Kinds of Basketball Socks

• Main Authors: Chun-Wei Lo, 羅俊偉
• Other Authors: Tzu-Lin Wong
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/49126059706590859221

碩士 === 國立臺北教育大學 === 體育學系碩士班 === 102 === The purpose of the study is to investigate the influences of the three basketball socks on the ankle joint angle, knee joint angle and lower limbs muscle EMG activation in landing. Methods and procedures: eight university male basketball players without lower limb injury history as the object (age: 19.8 ± 1.16 years old, height: 178 ± 5.68 cm, weight: 72 ± 4.72 kg). Using a Mega Speed Ms25k high-speed camera (100Hz) along the sagittal plane for two dimensional shooting, combined with an AMTI force plate (1000Hz) and Biovision EMG (1000Hz), capture the subjects’ landing movements from 70 cm height synchronously. The films were quantified by Kwon3D motion analysis software and obtained kinematical parameters through establishing human body segment parameters (BSP), calibrating the Kwon CC reference frame, and Direct-Linear Transformation. Force plate primitive signals were processed through DASYLab6.0 analyzing software, obtained the primitive ground reacting force after filtering and scaling, and normalized the GRF with body weight (B.W), then obtained the two-dimensional coordinates by the center of pressure formula. Obtained the average EMG amplitude through the EMG signals by DasyLab 6.0 software setting and normalized with the average maximum voluntary contraction (MVC). Processed the obtained experimental parameters with SPSS for Windows software, and analyzed with one-way ANOVA, repeated measures , the level of significance for this experiment is set to α=.05. Results: Kinematics: the ankle joint angle at the moment in landing, socks C has obvious difference at the first peak value to socks A and B（P＜.05）﹔the ankle joint angle at the lowest point of body weight, socks C has obvious difference at the first peak value to socks A and B（P＜.05）. Kinetics: the peak value of the largest vertical component of force at landing､ the maximum loading rate during landing and 50ms passive impulse at landing, socks C has obvious difference to socks A and B（P＜.05）. EMG: there are no significant differences among the parameters of the rectus femoris､biceps femoris､tibialis anterior and gastrocnemius. Conclusion: socks C with different designs in the left foot､right foot and padding on the toe and gore heel in landing has no significant cushioning effect to the hip joint and knee joint, but socks C indicate better cushioning effect to the ankle joint, can reduce the risk of lower limbs injury in landing. Suggestion: Future researchers can compare the anatomy of athletic socks, including the overall compression and elasticity for sportsmen’s further reference of purchase.