Department of Physical Therapy, West Coast University, 590 N Vssermont Ave, Los Angeles, CA, 90004, USA; Department of Physical Therapy, Temple University, 1801 N Broad St., Philadelphia, PA, 19122, USA.
Department of Physical Therapy, Temple University, 1801 N Broad St., Philadelphia, PA, 19122, USA.
Gait Posture. 2021 Mar;85:78-83. doi: 10.1016/j.gaitpost.2021.01.020. Epub 2021 Jan 23.
The use of virtual reality (VR) in clinical settings has increased with the introduction of affordable, easy-to-use head-mounted displays (HMDs). However, some have raised concerns about the effects that HMDs have on posture and locomotion, even without the projection of a virtual scene, which may be different across ages.
How does HMD wear impact the kinematic measures in younger and older adults?
Twelve healthy young and sixteen older adults participated in two testing conditions: 1) TUG with no HMD and 2) TUG with an HMD displaying a scene of the actual environment (TUG). The dependent variables were the pitch, yaw, and roll peak trunk velocities (PTVs) in each TUG component, turning cadence, and the time to complete the TUG and its components - SIT-TO-STAND, TURN, WALK, and STAND-TO-SIT.
Wearing the HMD decreased turning cadence and pitch and yaw PTVs in all TUG components, decreased roll PTV in SIT-TO-STAND and TURN, and increased the time taken to complete all TUG components in all participants. Wearing the HMD decreased the pitch PTV in SIT-TO-STAND in older relative to younger adults. Wearing an HMD affected TUG performance in younger and older adults, which should be considered when an HMD is used for VR applications in rehabilitation.
Our findings highlight the importance of considering the physical effect of HMD wear in clinical testing, which may not be present with non-wearable VR technologies.
随着价格实惠、易于使用的头戴式显示器 (HMD) 的推出，虚拟现实 (VR) 在临床环境中的应用有所增加。然而，有人担心 HMD 即使在没有虚拟场景投影的情况下，也会对姿势和运动产生影响，而这种影响在不同年龄段可能会有所不同。
HMD 佩戴如何影响年轻和老年成年人的运动学测量？
12 名健康的年轻成年人和 16 名老年成年人参加了两种测试条件：1）无 HMD 的 TUG 和 2）显示实际环境场景的 HMD（TUG）的 TUG。依赖变量是每个 TUG 组件中的俯仰、偏航和滚动峰值躯干速度 (PTV)、转弯步频以及完成 TUG 及其组件 - 从坐到站、转弯、行走和站到站的时间。
佩戴 HMD 会降低所有 TUG 组件中的转弯步频以及俯仰和偏航 PTV，并降低 SIT-TO-STAND 和 TURN 中的滚动 PTV，同时增加所有参与者完成所有 TUG 组件的时间。佩戴 HMD 会降低老年人 SIT-TO-STAND 中的俯仰 PTV 相对于年轻成年人。佩戴 HMD 会影响年轻和老年成年人的 TUG 表现，因此在康复中使用 HMD 进行 VR 应用时应考虑这一点。
我们的研究结果强调了在临床测试中考虑 HMD 佩戴对物理影响的重要性，而这种影响在使用不可穿戴 VR 技术时可能不存在。
