Body size and lower limb posture during walking in humans.
Body size and lower limb posture during walking in humans.
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DOI：
10.1371/journal.pone.0172112
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发表时间：
2017
期刊：
影响因子：
3.7
通讯作者：
Sládek V
中科院分区：
文献类型：
--
作者：
Hora M;Soumar L;Pontzer H;Sládek V
我们测试运动姿势是否与人类的体重和下肢长度相关，并探讨身体大小和姿势如何影响行走过程中的净关节力矩。我们获得了步态数据为24名女性和25名男性使用三维运动捕捉系统和压力测量鞋垫。我们采用一般线性模型和共性分析来评估身体质量和下肢长度对髋关节、膝关节和踝关节屈曲角度的独立影响，同时控制性别和速度。此外，我们使用逆动力学模型的净关节力矩的大小和姿势的影响。在站立早期，体重对膝关节屈曲有负影响（p < 0.01），而下肢长度对髋关节屈曲有负影响（p < 0.05）。身体质量唯一地解释了膝关节屈曲的15.8%的方差，而下肢长度唯一地解释了髋关节屈曲的5.4%的方差。这两个检测到的身体大小和姿势之间的关系是一致的时刻缓和姿势调整我们的模型预测。在后期的立场，没有显着的身体大小和姿势之间的关系。体型较大的人在站立早期减少了髋关节和膝关节的屈曲，这导致这些关节处的净力矩适度。
We test whether locomotor posture is associated with body mass and lower limb length in humans and explore how body size and posture affect net joint moments during walking. We acquired gait data for 24 females and 25 males using a three-dimensional motion capture system and pressure-measuring insoles. We employed the general linear model and commonality analysis to assess the independent effect of body mass and lower limb length on flexion angles at the hip, knee, and ankle while controlling for sex and velocity. In addition, we used inverse dynamics to model the effect of size and posture on net joint moments. At early stance, body mass has a negative effect on knee flexion (p < 0.01), whereas lower limb length has a negative effect on hip flexion (p < 0.05). Body mass uniquely explains 15.8% of the variance in knee flexion, whereas lower limb length uniquely explains 5.4% of the variance in hip flexion. Both of the detected relationships between body size and posture are consistent with the moment moderating postural adjustments predicted by our model. At late stance, no significant relationship between body size and posture was detected. Humans of greater body size reduce the flexion of the hip and knee at early stance, which results in the moderation of net moments at these joints.