Carrying heavy asymmetrical loads increases postural sway during quiet standing in older adults
Carrying heavy asymmetrical loads increases postural sway during quiet standing in older adults
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携带不对称的重物会增加老年人安静站立时的姿势摇摆
DOI：
10.1007/s40520-017-0872-y
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发表时间：
2018
影响因子：
4
通讯作者：
M. Price
中科院分区：
文献类型：
--
作者：
M. Hill;M. Price
在许多日常和职业活动中，手中持有不对称的负载是常见的，这取决于负载质量，可能会改变姿势稳定性。本研究的目的是确定负载大小举行不对称的手在老年人的姿势摇摆的影响。在以下条件下评估了18名健康老年人（年龄65.9 ± 5.7岁）：（1）在没有外部负荷（0%）的情况下站立，（2）在优势手中握住含有5%、（3）10%和（4）20%体重的杂货袋时站立。压力中心（COP）在前后和内外侧方向的总位移（cm）、平均COP速度（cm s-1）和COP面积（cm 2）用于间接评估姿势摇摆。COP面积（R2 = 0.96）、前后（R2 = 0.85）和内外侧（R2 = 0.84）COP位移随载荷增加而线性增加。与0%相比，20%负荷条件引起姿势摇摆的最大增加（d = 2.1-3.6），而5%负荷对摇摆没有影响（P ≥ 0.05）。相比之下，当保持5%（d = 1.6）、10%（d = 1.4）和20%（d = 1.5）体重的负荷时，与0%相比，平均COP速度降低了相似的量（均P < 0.001）。较慢的COP速度，结合较大的COP位移可能表明姿势反应受到限制和/或延迟。从预防跌倒的角度来看，建议老年人避免承受超过体重5%的不对称外部负荷。
Holding asymmetrical loads in the hands is common during many daily and occupational activities which, depending on the load mass, may alter postural stability. The purpose of this study was to determine the effect of load magnitude held asymmetrically in the hand on postural sway in older people. Eighteen healthy older adults (age 65.9 ± 5.7 years) were assessed in the following conditions; (1) standing without an external load (0%), (2) standing while holding a grocery bag containing 5%, (3) 10% and (4) 20% body mass in the dominant hand. The total displacement of the centre of pressure (COP) in the anteroposterior and mediolateral directions (cm), mean COP velocity (cm s−1) and COP area (cm2) were used to indirectly assess postural sway. The COP area (R2 = 0.96), anteroposterior (R2 = 0.85) and mediolateral (R2 = 0.84) COP displacement increased linearly with additional load. The 20% load condition elicited the greatest increase in postural sway (d = 2.1–3.6) compared to 0%, while the 5% load had no effects on sway (P ≥ 0.05). In contrast, the mean COP velocity decreased by similar amounts when holding a load at 5% (d = 1.6), 10% (d = 1.4) and 20% (d = 1.5) body mass, compared to 0% (all P < 0.001). The slower COP velocity, combined with greater COP displacements may suggest that postural reactions were restricted and/or delayed. From a fall-prevention perspective, it is advised that older people avoid holding asymmetrical external loads greater than 5% of body mass.
直立站立期间外部负载对平衡控制的影响：实验结果和基于模型的预测。
影响因子：
2.4
作者：
Qu,Xingda;Nussbaum,MauryA
通讯作者：
Nussbaum,MauryA
承载负载和站立时的姿势摇摆：负载放置和大小的影响。
DOI：
--
发表时间：
2008
期刊：
Work (Reading, Mass.)
影响因子：
--
作者：
Zultowski,Ilyse;Aruin,Alexander
通讯作者：
Aruin,Alexander