鞋与场地表面间的摩擦系数对乒乓球运动员跨步动作膝关节生物力学特征的影响

发布时间：2018-03-24 07:41

本文选题：摩擦系数　切入点：跨步动作　出处：《北京体育大学学报》2017年06期

【摘要】：目的:探讨鞋和场地表面对摩擦系数的影响,并比较在不同摩擦系数条件下,乒乓球运动员正手跨步击球过程中膝关节生物力学特征的改变。方法:首先通过拖拽的方法采集并计算2双不同的乒乓球鞋与3种场地表面之间的摩擦系数,之后12名男子乒乓球运动员穿着两双鞋在三种场地表面上进行正手跨步击球动作,采集并计算运动过程中鞋与场地表面之间的摩擦系数,同时记录运动过程中受试者下肢的运动学和动力学数据。结果:拖拽测试过程中,鞋与场地表面对摩擦系数影响的交互作用显著(P=0.011),但在实际运动过程中,鞋对摩擦系数的影响不显著(P=0.113),场地表面对摩擦系数的影响显著(P0.001);摩擦系数对地面反作用力峰值时刻膝关节屈曲角度及整个击球过程中膝关节最小屈曲角度有显著影响(P=0.026),对180°跨步动作膝关节最大内收力矩有显著影响(P=0.038)。结论:运动过程中鞋与场地表面之间的摩擦系数不同于拖拽测试,在对比鞋或场地表面的摩擦系数时,要考虑测量方法的差异;摩擦系数的不同影响跨步击球过程中膝关节的生物力学特征,高摩擦系数条件下膝关节生物力学特征的改变在一定程度上增加了膝关节的负荷,可能会增加膝关节的损伤;与新、旧运动鞋相比,场地表面的选择对摩擦系数的影响更大,且高摩擦系数会增加膝关节负荷,因此,在乒乓球运动中,对场地表面的选择应该更加谨慎。
[Abstract]:Objective: to study the influence of shoes and the surface of the ground on the friction coefficient, and compare the friction coefficient under different conditions. The change of biomechanical characteristics of knee joint during forehand striding of table tennis players. Methods: the friction coefficient between two pairs of table tennis shoes and three kinds of ground surfaces was collected and calculated by dragging and dragging method. Then 12 men table tennis players wearing two pairs of shoes on the surface of three kinds of forehand stride batting, collect and calculate the friction coefficient between the shoes and the surface of the field during the exercise. At the same time, the kinematics and dynamics data of lower limbs were recorded during exercise. Results: in the course of towing test, the interaction between shoes and the surface of the ground on the friction coefficient was significant (P0.011), but in the course of actual exercise, The influence of shoes on friction coefficient was not significant (P < 0. 113), and the influence of the surface of the ground on the friction coefficient was significant (P 0. 001), and the friction coefficient had a significant effect on the knee joint flexion angle at the peak moment of the ground reaction force and the minimum flexion angle of the knee joint during the whole batting process. The maximum adductive torque of knee joint in 180 掳stride action is significantly affected by the influence of P0. 026. Conclusion: the friction coefficient between the shoe and the surface of the ground during exercise is different from that of the towing test. When comparing the friction coefficient of the shoe or the surface of the ground, we should consider the difference of measuring method, the difference of friction coefficient affects the biomechanical characteristics of the knee joint in the course of the step batting. Under the condition of high friction coefficient, the change of biomechanical characteristics of knee joint increases the load of knee joint to some extent, and may increase the damage of knee joint, compared with the new and old sports shoes, the choice of the site surface has more influence on the friction coefficient. And the high friction coefficient will increase the load of knee joint, therefore, in table tennis, the choice of the site surface should be more cautious.
【作者单位】：北京体育大学;
【分类号】：G804.61;G846

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