Background

Hip motion in the transverse plane is coupled with foot motion in the frontal plane during closed kinematic activities, such as gait. Considering that movement patterns and bone alignment might influence passive mechanical properties of joints in the long term, it is possible that hip passive stiffness and foot complex stiffness and alignment are related to each other.

Objectives

To investigate whether hip passive stiffness, midfoot passive stiffness and shank-forefoot alignment are related to each other.

Method

Thirty healthy adult individuals with a mean age of 25.4 years participated (18 women and 12 men). The Foot Torsimeter was used to measure midfoot stiffness, and hip stiffness and foot alignment were measured using clinical measures. Pearson and Spearman correlation coefficients were calculated to test the associations between each pair of variables, with α = 0.05.

Results

Hip stiffness was positively correlated with midfoot absolute stiffness (r = 0.41, p = 0.02), indicating that increased hip stiffness is associated with increased midfoot stiffness. There were no associations between shank-forefoot alignment and the other variables.

Conclusions

In clinical settings, individuals with reduced hip passive stiffness may also have reduced midfoot passive stiffness, and vice versa. Shank-forefoot alignment is not linearly associated with hip or midfoot passive stiffness.

中文翻译：

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髋部被动僵硬与中足被动僵硬有关

背景

在闭合运动学活动（例如步态）期间，横向平面中的髋关节运动与额平面中的足部运动相结合。考虑到运动模式和骨骼对齐可能会长期影响关节的被动力学性能，髋部被动僵硬和足部复合体僵硬和对齐可能相互关联。

目标

研究髋部被动僵硬、中足被动僵硬和小腿前足对齐是否相互关联。

方法

30 名平均年龄为 25.4 岁的健康成年个体（18 名女性和 12 名男性）参与了研究。足部扭力计用于测量足中部僵硬，并使用临床措施测量髋部僵硬和足部对齐。计算 Pearson 和 Spearman 相关系数以检验每对变量之间的关联，α = 0.05。

结果

髋部刚度与足中部绝对刚度呈正相关（r = 0.41，p = 0.02），表明髋部刚度增加与足中刚度增加有关。小腿前足对齐与其他变量之间没有关联。

结论

在临床环境中，髋部被动僵硬降低的个体也可能中足被动僵硬降低，反之亦然。小腿前足对齐与髋部或足中部被动僵硬呈线性关系。