Department of Kinesiology and Health, Georgia State University, 125 Decatur St, Suite-137, Atlanta, GA 30303, USA.
Department of Kinesiology and Health, Georgia State University, 125 Decatur St, Suite-137, Atlanta, GA 30303, USA.
Hum Mov Sci. 2022 Oct;85:102981. doi: 10.1016/j.humov.2022.102981. Epub 2022 Jul 28.
Anterior load carriage, identified as a fall risk factor, is commonly required in daily living activities and occupations. Dynamic gait stability quantifies the kinematic relationship between the human body's center of mass and base of support and has been widely used to assess fall risk. The current study was conducted as a portion of a larger project exploring the effects of anterior load carriage on the control of body stability during various walking conditions. Particularly, this study examined the effect of anterior load carriage on dynamic gait stability during level overground walking among young adults. It was hypothesized that anterior load carriage would compromise dynamic gait stability during walking. Thirty young adults were evenly randomized into three groups: no load (Group 1), 10% body mass (bm) (Group 2), and 20% bm (Group 3). Each group walked overground at a self-selected speed carrying the assigned load. Kinematics were collected for the body and load through motion capture. Dynamic gait stability, gait speed, step length, and trunk angle were determined based on the kinematics and compared between groups. The results did not detect significant load-related effects on dynamic gait stability, step length, or gait speed. A significant load-related difference was found in trunk angle: the heavier the load, the more backward leaned trunk. Further analyses revealed a more posteriorly-leaned trunk in Groups 2 and 3 than Group 1 and in Group 3 than Group 2. The results indicated that young adults could maintain dynamic gait stability when carrying a front load by leaning the trunk backward but keeping other gait parameters unchanged.
前负荷搬运，被认为是跌倒的风险因素，在日常生活活动和职业中很常见。动态步态稳定性量化了人体重心和支撑基础之间的运动关系，已被广泛用于评估跌倒风险。本研究是一个更大项目的一部分，该项目旨在探索前负荷搬运对不同行走条件下身体稳定性控制的影响。特别是，本研究检查了前负荷搬运对年轻人在平地行走时动态步态稳定性的影响。假设前负荷搬运会影响行走时的动态步态稳定性。30 名年轻人被平均随机分为三组：无负荷（第 1 组）、10%体重（bm）（第 2 组）和 20%bm（第 3 组）。每组以自定速度携带指定的负荷在地面上行走。通过运动捕捉收集身体和负荷的运动学数据。根据运动学数据确定动态步态稳定性、步速、步长和躯干角度，并在组间进行比较。结果未发现动态步态稳定性、步长或步速与负荷相关的显著影响。在躯干角度上发现了与负荷相关的显著差异：负荷越重，躯干向后倾斜的幅度越大。进一步的分析显示，第 2 组和第 3 组的躯干比第 1 组更向后倾斜，第 3 组比第 2 组更向后倾斜。结果表明，年轻人在携带前负荷时可以通过向后倾斜躯干来保持动态步态稳定性，同时保持其他步态参数不变。
