石家庄市部分青年男性“外八字”步态足底压力特征分析

背景:外八字的脚外翻破坏了膝关节正常力的分布,使关节一侧所受的生物应力增大,对侧相对减少。目的:更进一步认识"外八字"步态行走过程中足底压力的特征。方法:运用比利时Footscan足底压力分布测试系统对石家庄市部分20～25岁的青年男性进行足底压力测试,通过分析筛选出双足步态均正常的青年男性39人为正常步态组,筛选出双足步态均为外八字的青年男性39人为异常步态组分别进行分析。结果与结论:异常步态组青年左足足底第3跖骨峰力值明显高于正常步态组(P<0.01),第5跖骨、足弓两区域骨峰力值明显低于正常步态组(P<0.05)。正常步态组青年左、右足足底第1跖骨、第5跖骨两区域冲量差异有显著性意义(P<0.05)。异常步态组青年左、右足足底第2,4跖骨冲量差异有显著性意义(P<0.01,P<0.05)。异常步态组与正常步态组青年左足足底第3跖骨区域差异有显著性意义(P<0.05),足跟内侧、足跟外侧两区域冲量差异有非常显著性意义(P<0.01);右足足底足跟内侧区域冲量比较差异有非常显著性意义(P<0.01)。提示"外八字"行走会导致蹬伸时的推进力不是斜向向前,行走方向上的蹬地力较小;行走过程中足受力顺序不是沿足纵弓的方向,而是有一定的夹角,因此足弓不能起到减震的作用,冲量的增大也就增加损伤的概率。所以"外八字"步态者应当注意足底压力和作用时间的关系,增加足与地面的接触时间,从而减小冲击力值,避免运动损伤。

Plantar pressure characteristics in some young males with toe-out foot from Shijiazhuang city

BACKGROUND: Toe-out feet destroys the distribution of normal power in knee joint, then increases the biological stress on one side and reduces on the other.OBJECTIVE:To further understand the characteristics of plantar pressure in toe-out foot. METHODS:Footscan plantar pressure test system (Belgium) was used to detect pole pressure of young males aged 20-25 years, selected from Shijiazhuang. A total of 39 had normal foot as normal group, and 39 toe-out foot as abnormal group. RESULTS AND CONCLUSION:The peak torque of foot in Meta3 on left side in abnormal group was higher than normal group (P<0.01), while the peak torque in Meta5 and arch was lower than normal group (P<0.05). There were significant differences in impulse in Meta1 and Meta5 of normal group (P<0.05);while in abnormal group, highly significant differences were observed in Meta2 and Meta4 (P<0.01, P<0.05). Between two groups, disparity presented in toe 3 of the left foot (P<0.05) and in heel medial, heel lateral regions (P<0.01), respectively. In the right foot, there were highly significant differences in heel medial (P<0.01). Toe-out foot result in the slant power rather than straight direction, so the strength in walking direction is small. During walking, stress sequence is not along the arcus pedis longitudinalis, so the foot arch cannot reduce the shock power but increase the impulse and risk of injury. People with toe-out foot should pay attention to the relation of function time and foot pole pressure, which can increase the contact time with the ground to reduce impact value and avoid sports injury.