Gender differences in pelvic motions and center of mass displacement during walking: Stereotypes quantified
Gender differences in pelvic motions and center of mass displacement during walking: Stereotypes quantified
复制标题
DOI：
10.1089/15246090260137626
复制
发表时间：
2002-06-01
期刊：
影响因子：
--
通讯作者：
Kerrigan, DC
中科院分区：
文献类型：
--
作者：
Smith, LK;Lelas, JL;Kerrigan, DC
目的：人们普遍认为，男女走路的方式不同，但这一看法尚未得到定量步行（步态）研究的支持，研究发现，相似之处多于差异。然而，以前从未检查过骨盆和质心（COM）运动。我们假设性别差异存在于两个骨盆的灵活性（运动的骨盆在冠状面）和垂直COM位移。可量化的差异可能具有临床和生物力学的重要性。方法：我们测试了120名受试者分为四组的年龄和性别。骨盆运动和COM位移记录使用3-D运动分析系统和平均超过三个步行试验在舒适的步行速度。将数据绘制成图，并对各组之间的时间值、骨盆角范围和标准化为腿长的COM位移进行定量比较。（平均ISD）：女性9.4 +/- 3.5度，男性7.4 +/- 3.4度（p = 0.0024），垂直COM位移较小：女性为腿长的3.7 ± 0.8%，男性为3.3 ± 0.9%结论：与男性相比，女性的骨盆弯曲度更大，垂直COM位移更少，这是基于刻板印象的性别差异。目前尚不清楚这些差异是否是性别与社会或文化影响的内在结果。女性可能在冠状面使用更大的骨盆运动来减少其垂直COM位移，从而在行走过程中节省能量。从能量的角度来看，骨盆活动度的增加可能是有利的，但它也与腰骶部活动度的增加有关，这可能与腰痛的病因和进展有关。
Objectives: A general perception that women and men walk differently has yet to be supported by quantitative walking (gait) studies, which have found more similarities than differences. Never previously examined, however, are pelvic and center of mass (COM) motions. We hypothesize the presence of gender differences in both pelvic obliquity (motion of the pelvis in the coronal plane) and vertical COM displacement. Quantifiable differences may have clinical as well as biomechanical importance.Methods: We tested 120 subjects separated into four groups by age and gender. Pelvic motions and COM displacements were recorded using a 3-D motion analysis system and averaged over three walking trials at comfortable walking speed. Data were plotted, and temporal values, pelvic angle ranges, and COM displacements normalized for leg length were quantitatively compared among groups.Results: Comparing all women to all men, women exhibited significantly more pelvic obliquity range (mean ISD): 9.4 +/- 3.5 degrees for women and 7.4 +/- 3.4 degrees for men (p = 0.0024), and less vertical COM displacement: 3.7 +/- 0.8% of leg length for women and 3.3 +/- 0.9% for men (P = 0.0056).Conclusions: Stereotypically based gender differences were documented with greater pelvic obliquity and less vertical COM displacement in women compared with men. It is unclear if these differences are the intrinsic result of gender vs. social or cultural effects. It is possible that women use greater pelvic motion in the coronal plane to reduce their vertical COM displacement and, thus, conserve energy during walking. An increase in pelvic obliquity motion may be advantageous from an energy standpoint, but it is also associated with increased lumbosacral motion, which may be maladaptive with respect to the etiology and progression of low back pain.