Effect of Gender Difference on Lower Extremity Biomechanics During Kneeling to Standing

• Main Authors: Yen-Wen Chen, 陳彥文
• Other Authors: Tzu-Lin Wong
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/czm3h4

碩士 === 國立臺北教育大學 === 體育學系碩士班 === 107 === Background: The quick and repeated tasks were led to lower extremity injury during kneeling to standing in baseball catcher. However, it is still unclear that the lower extremity injury caused by the gender difference during kneeling to standing. Purpose: The purpose of this study was to examine the effect of gender difference on kinematics and kinetics during kneeling to sanding in adolescent baseball catchers. Methods: 10 male (age: 14 ± 1.1 years; height: 171.9 ± 4.17 cm; mass: 60.18 ± 3.76 kg) and 10 female (age: 14 ± 1.17 years; height: 160.9 ± 4.6 cm; mass : 57.89±5 kg) were without history of the lower extremity injuries. A Mega high-speed camera (120 Hz) synchronized with an ATMI force plate (1,200 Hz) was used to collect data during the kneeling to sanding tasks. The Kwon 3D and Dasy Lab 6.0 software were used to quantify the kinematics and kinetics parameters. The inverse dynamics solution was used to calculate the joint force and moment. A independent t-test was conducted (α = 0.05) to compare gender difference. Results: The results indicated that male demonstrated greater trunk lean angle and knee range of motion than female. The loading rate, the displacement of antero-posterior COP and medio-lateral COP were greater female the male. Conclusion: Male demonstrated greater trunk lean angle during kneeling to sanding while the increase of the hip joint angle reduced the displacement of center of pressure to maintain the body equilibrium. The muscle burden maintains the body balance and increases the risk of injury. The kneeling to standing, female showed greater knee joint angle than male, but at this time the loading rate and displacement of the center of pressure increase, which is easy to cause lower limb joints. Therefore, the neuromuscular training should be strengthened to reduce the risk of lower limb injury.