Urabe Yukio, Fukui Kazuki, Harada Keita, Tashiro Tsubasa, Komiya Makoto, Maeda Noriaki
Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan.
Healthcare (Basel). 2022 Apr 4;10(4):680. doi: 10.3390/healthcare10040680.
To prevent falls, it is important to devise a safe balance training program that can be easily performed. This study investigated whether tilting an image in virtual reality (VR) can generate a center-of-gravity sway. Five men and five women were asked to rest standing upright (control condition) and to rest standing upright with a head-mounted display showing a tilted virtual image (VR condition), and changes in their standing balance were observed. Standing balance was assessed by measuring the distance traveled by the center of pressure (COP) of each of the participants’ legs. In order to investigate the effects of different tilt speeds and angles on COP, four different images were displayed in VR: an image tilting to 10° moving at a rate of 1°/s; an image tilting to 20° moving 1°/s; an image tilting to 10° moving 10°/s; an image tilting to 20° moving 10°/s. Change in COP was significantly greater in the VR than in the control condition (p < 0.01), and a tilt of 10° moving 1°/s showed the greatest change in COP (p < 0.01). Tilting an image in VR while in a resting standing position can change an individual’s COP; thus, VR may be applied to balance training.
为预防跌倒，设计一个易于实施的安全平衡训练计划很重要。本研究调查了在虚拟现实（VR）中倾斜图像是否会产生重心摆动。让五名男性和五名女性分别在直立休息状态（对照条件）以及佩戴头戴式显示器并显示倾斜虚拟图像的直立休息状态（VR条件）下进行测试，并观察他们站立平衡的变化。通过测量每位参与者双腿压力中心（COP）移动的距离来评估站立平衡。为了研究不同倾斜速度和角度对COP的影响，在VR中展示了四张不同的图像：一张以1°/秒的速度倾斜至10°的图像；一张以1°/秒的速度倾斜至20°的图像；一张以10°/秒的速度倾斜至10°的图像；一张以10°/秒的速度倾斜至20°的图像。与对照条件相比，VR条件下COP的变化显著更大（p < 0.01），且以1°/秒的速度倾斜至10°时COP的变化最大（p < 0.01）。在静止站立姿势下在VR中倾斜图像可改变个体的COP；因此，VR可应用于平衡训练。
