Graduate School of Education, Shandong Sport University, Jinan, Shandong, China.
Medical Department, Weishan County People's Hospital, Jining, Shandong, China.
PLoS One. 2023 Dec 11;18(12):e0295569. doi: 10.1371/journal.pone.0295569. eCollection 2023.
This study aimed to assess the static balance ability of the older adults with mild cognitive impairment (MCI) while standing on soft and hard support surfaces.
Forty older adults participated in this study (21 in the MCI group and 19 in the control group). Participants were required to perform balance tests under four conditions of standing: standing on a hard support surface with eyes open, standing on a soft support surface with eyes open, standing on a hard support surface with eyes closed, and standing on a soft support surface with eyes closed. Each test was measured in three trials and each trial lasted 30 seconds. Participants were asked to take off their shoes and place their feet in a parallel position with a 20-centimeter distance for bipedal support. The trajectories of the center of pressure (COP) were measured using a Kistler force platform with a frequency of 1000 Hz to assess balance while standing in both groups, with larger COP trajectories indicating poorer static balance in older adults.
With eyes open, the displacement of COP in the anterior-posterior direction(D-ap) (hard support surface: P = 0.003) and the 95% confidence ellipse area(95%AREA-CE) (soft support surface: P = 0.001, hard support surface: P < 0.001) of the COP in the MCI group standing on hard and soft support surfaces were significantly larger than the control group. The 95%AREA-CE (P < 0.001) of the COP in the MCI group on the soft support surface was significantly larger than on the hard support surface. With eyes closed, the root mean square distance(RDIST), root mean square distance-ML(RDISTml), and 95%AREA-CE of the COP were no significant between-group differences when standing on hard support surfaces. However, the RDIST (P = 0.014), RDISTml (P = 0.014), and 95%AREA-CE (P = 0.001) of the COP in the MCI group on the soft support surfaces were significantly larger than the control group. The 95%AREA-CE (P < 0.001), RDIST (P < 0.001), and RDISTml (P < 0.001) of the COP in the MCI group on the soft support surface were significantly larger than the hard support surface.
With eyes open, the older adults with MCI showed poorer static balance ability compared to the older adults with normal cognition on soft and hard support surfaces. With eyes closed, the older adults with MCI showed poorer static balance on soft support surfaces, but no differences on hard support surfaces compared with the older adults with normal cognition. With eyes open and closed, the older adults with MCI showed poorer static balance on soft support surfaces as compared to hard support surfaces.
本研究旨在评估轻度认知障碍（MCI）老年人在软、硬支撑表面站立时的静态平衡能力。
40 名老年人参与了这项研究（MCI 组 21 人，对照组 19 人）。要求参与者在四种站立条件下进行平衡测试：睁眼站立在硬支撑表面上、睁眼站立在软支撑表面上、闭眼站立在硬支撑表面上、闭眼站立在软支撑表面上。每项测试测量三次，每次持续 30 秒。参与者被要求脱鞋，并将双脚放在 20 厘米的距离内，以保持双脚支撑。使用 Kistler 力平台以 1000 Hz 的频率测量中心压力（COP）轨迹，以评估两组老年人的站立平衡能力，COP 轨迹越大，老年人的静态平衡能力越差。
睁眼时，MCI 组在硬、软支撑表面上的 COP 前-后向位移（D-ap）（硬支撑表面：P=0.003）和 COP 95%置信椭圆面积（95%AREA-CE）（软支撑表面：P=0.001，硬支撑表面：P<0.001）明显大于对照组。MCI 组在软支撑表面上的 COP 95%AREA-CE（P<0.001）明显大于硬支撑表面。闭眼时，在硬支撑表面上站立时，COP 的均方根距离（RDIST）、均方根距离-ML（RDISTml）和 COP 的 95%AREA-CE 无明显组间差异。然而，MCI 组在软支撑表面上的 RDIST（P=0.014）、RDISTml（P=0.014）和 COP 的 95%AREA-CE（P=0.001）明显大于对照组。MCI 组在软支撑表面上的 COP 95%AREA-CE（P<0.001）、RDIST（P<0.001）和 RDISTml（P<0.001）明显大于硬支撑表面。
睁眼时，与认知正常的老年人相比，MCI 老年人在软、硬支撑表面上的静态平衡能力较差。闭眼时，与认知正常的老年人相比，MCI 老年人在软支撑表面上的静态平衡能力较差，但在硬支撑表面上没有差异。睁眼和闭眼时，与硬支撑表面相比，MCI 老年人在软支撑表面上的静态平衡能力更差。
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