高弓足跑步支撑阶段的动力学特征

发布时间：2018-03-30 12:00

本文选题：运动生物力学　切入点：高弓足　出处：《体育学刊》2017年02期

【摘要】：根据足弓高度指数选取9名高弓足学生为实验组和9名正常足学生为对照组,采用KISTLER三维测力台对两组受试者跑步时支撑阶段的力学控制特征进行分析。研究结果发现:1)垂直方向上,高弓足者着地时的冲击力峰值和第1载荷率显著高于正常足者(P㩳0.05);推动力峰值和第2载荷率以及到达峰值的时间两组间差异无统计学意义(P㧐0.05)。2)前后方向上,高弓足者加速力峰值高于正常足者(P㩳0.05),其它指标在两组间的差异无统计学意义(P㧐0.05)。3)内外方向上,高弓足者跑步时内外方向上力的最大值、最小值以及力值波动范围均高于正常足者(P㩳0.05),其它指标两组间无统计学意义(P㧐0.05)。结果说明:1)高弓足者受到较高的冲击力(峰值)和载荷率,以及僵硬的足弓可能暗示了高弓足者着地时足弓缓冲震荡的能力降低,是造成高弓足损伤的重要原因之一;2)高弓足者与正常足者前后和内外方向上的差异性可能是造成高弓足损伤的潜在因素之一,这些差异性可能与足弓僵硬、下肢肌肉活性较差以及肌肉做功的差异有关。总之,高弓足者在跑步支撑阶段对动力学控制能力较差,反映了高弓足与正常足者跑步时力学控制机制的不同。
[Abstract]:According to the foot arch height index, 9 high arch foot students were selected as experimental group and 9 normal foot students as control group. The mechanical control characteristics of the two groups during running were analyzed by using KISTLER three dimensional dynamometer.The study found that in the vertical direction,The peak impact force and the first load rate of the high arch foot on landing were significantly higher than those of the normal foot, but there was no significant difference between the two groups in the direction of the peak driving force, the second load rate and the time to reach the peak value.The peak value of acceleration force in the high arch foot was higher than that in the normal foot. There was no significant difference in other indexes between the two groups in the internal and external direction, and the maximum value of the internal and external force in the high arch foot was higher than that in the outside direction when the high arch foot was running.The fluctuation range of minimum value and force value were higher than that of normal foot group (P < 0.05), but there was no statistical significance between the two groups.The results show that the high arched foot is subjected to higher impact (peak) and higher load rate, and the rigid arch may indicate a decrease in the ability of the high arch foot to cushion the shock when landing on the ground.The difference between the anterior and outer directions of the high arch foot and the normal foot may be one of the potential factors to cause the high arch foot injury, and these differences may be stiff with the foot arch.The lower extremity muscle activity is poor and the difference of muscle work is related.In a word, the ability of high arch foot to control dynamics in running support stage is poor, which reflects the difference of mechanical control mechanism between high arch foot and normal foot.
【作者单位】：苏州大学体育学院;苏州外国语学校体育组;
【基金】：江苏省品牌专业建设工程资助项目 2013江苏省高校自然科学基金(13KJB310020) 2013年高校哲学社会科学基金资助项目(2013SJB890016)
【分类号】：G804.6

【参考文献】