Chamberlin Claressa, Marmelat Vivien, Rosen Adam B, Burcal Christopher J
University of Nebraska at Omaha, School of Health and Kinesiology, NE, Omaha, USA.
University of Nebraska at Omaha, Department of Biomechanics, NE, Omaha, USA.
J Bodyw Mov Ther. 2021 Apr;26:268-272. doi: 10.1016/j.jbmt.2020.12.023. Epub 2020 Dec 21.
Controlling postural sway relies on the assessment and integration of external sensory stimuli by the central nervous system. When there is a loss of one or more of the sensory stimuli, there is often a decrease in balance performance. Visual biofeedback (VBF) has become a popular method to improve balance because of the supplementation to natural visual information with visual cues of the center of pressure. It is also possible to improve balance even further by increasing the scale of VBF. The aim of this investigation was to determine the effects of VBF and increasing VBF scale on single-limb balance in healthy adults.
Twenty healthy young adults were recruited. Participants underwent 24, 20-s single limb balance trials on both the right and the left leg. These trials were collected under 4 conditions: 1) eyes-open (EO) with no VBF, 2) EO with 1:1 scale VBF, 3) EO with 2:1 scale VBF, 4) EO with 5:1 scale VBF. Force plate outcomes included resultant, anterior-posterior, and medial-lateral Sway. A two-way repeated measures ANOVA was performed and a Bonferonni post-hoc test was used to determine the effects of VBF and VBF scale size on balance.
Differences were noted in AP Sway and Resultant Sway when VBF was present and the scale size was increased (p < 0.05).
Providing VBF decreases Sway in single-limb stance for young healthy adults, especially when the scale was increased beyond 1:1 VBF. These results may be clinically applicable for balance rehabilitation and training.
控制姿势摇摆依赖于中枢神经系统对外界感觉刺激的评估和整合。当一种或多种感觉刺激丧失时，平衡能力通常会下降。视觉生物反馈（VBF）由于用压力中心的视觉线索补充了自然视觉信息，已成为一种流行的改善平衡的方法。通过增加VBF的比例，也有可能进一步改善平衡。本研究的目的是确定VBF和增加VBF比例对健康成年人单腿平衡的影响。
招募了20名健康的年轻人。参与者对右腿和左腿分别进行了24次、每次20秒的单腿平衡试验。这些试验在4种条件下进行：1）无VBF睁眼（EO），2）1:1比例VBF睁眼，3）2:1比例VBF睁眼，4）5:1比例VBF睁眼。测力台测量结果包括合力、前后向和内外侧摇摆。进行了双向重复测量方差分析，并使用Bonferonni事后检验来确定VBF和VBF比例大小对平衡的影响。
当存在VBF且比例增大时，前后向摇摆和合力摇摆出现差异（p < 0.05）。
提供VBF可减少年轻健康成年人单腿站立时的摇摆，尤其是当比例增加到超过1:1 VBF时。这些结果可能在临床上适用于平衡康复和训练。
