Watanabe Miyoko, Tani Hiroaki
International University of Health and Welfare: 2600-1 Kitakanemaru, Ohtawara City, Tochigi Prefecture 324-8501, Japan.
J Phys Ther Sci. 2020 Jan;32(1):55-58. doi: 10.1589/jpts.32.55. Epub 2020 Jan 22.
[Purpose] Light-touch support (consisting of a load <100 g) is useful for reducing postural sway while standing and walking. However, it is unclear which types of touch and somatosensory inputs are more effective for improving postural control. This study aimed to clarify the effects of active and passive light-touch support, with and without visual information, on postural stability during tandem standing. [Participants and Methods] Eleven young healthy adults maintained tandem standing for 30 s under six conditions. The independent variables were light-touch condition (no, active or passive) and visual condition (eyes open or closed). Postural sway, as measured using a force plate, was considered to indicate postural stability. [Results] There was significantly less postural sway with active light touch compared with passive and no touch. Passive light touch resulted in significantly less sway than no touch. In addition, there was less postural sway with active light compared to passive light touch, especially with the eyes closed. The light-touch support force did not differ between conditions. [Conclusion] Both active and passive light-touch improved postural stability in comparison to no-touch. Active light-touch support significantly improved postural stability. These results could be used to inform therapeutic interventions within clinical settings.
[目的] 轻触支撑（负载小于100克）有助于减少站立和行走时的姿势晃动。然而，尚不清楚哪种类型的触摸和体感输入对改善姿势控制更有效。本研究旨在阐明主动和被动轻触支撑在有无视觉信息的情况下对串联站立时姿势稳定性的影响。[参与者和方法] 11名年轻健康成年人在六种条件下保持串联站立30秒。自变量为轻触条件（无、主动或被动）和视觉条件（睁眼或闭眼）。使用测力台测量的姿势晃动被视为姿势稳定性的指标。[结果] 与被动轻触和无轻触相比，主动轻触时的姿势晃动明显更少。被动轻触导致的晃动明显少于无轻触。此外，与被动轻触相比，主动轻触时的姿势晃动更少，尤其是在闭眼时。不同条件下轻触支撑力没有差异。[结论] 与无轻触相比，主动和被动轻触均能改善姿势稳定性。主动轻触支撑显著提高了姿势稳定性。这些结果可用于为临床环境中的治疗干预提供参考。
