University of Wisocnsin Milwaukee, Wiscosin State, Milwaukee, USA.
University of Wisocnsin Madison, Wiscosin State, Madison, USA.
BMC Geriatr. 2022 Apr 18;22(1):335. doi: 10.1186/s12877-022-03052-0.
BACKGROUND: Many older adults with physical limitations living in residential care apartments are unable to exercise in a standing position and are at risk for declining in muscle function leading to falls and injury. Novel approaches to achieve exercise benefits are needed. The purpose of this study was to test the effect of semi-recumbent vibration exercise on muscle outcomes in older adults living in residential care apartment complexes (RCACs). METHODS: A randomized, crossover design was used to examine the effect of semi-recumbent vibration exercise on muscle function and mass among 32 RCAC residents (mean age 87.5 years) with physical limitations. Participants received a randomized sequence of two study conditions: sham or vibration for 8 weeks each separated by a 4-week washout. Before and after the 8 weeks of vibration treatment and sham treatment, muscle mechanography was used to assess muscle function including jump power, weight-corrected jump power, and jump height. Short physical performance battery (SPPB) and handgrip strength were also used to measure muscle function. Bioelectrical impedance spectroscopy was used to estimate skeletal muscle mass. The effect of the vibration treatment on muscle outcomes was analyzed through mixed effects linear regression models. RESULTS: Vibration exercise leads to better jump height (p < .05) compared to sham exercise but also poorer chair rise performance (p = 0.012). Other muscle functions tests and muscle mass parameters showed non-significant changes. CONCLUSION: This small pilot study showed no conclusive results on the effect of semi-recumbent vibration exercise on muscle function and mass in older adults living in RCAC. However, the promising signals of improved jump performance could be used to power larger studies of longer duration with various vibration doses to determine the benefit of vibration exercise in this physically impaired, high-risk population with few exercise capabilities. TRIAL REGISTRATION: The study is registered at clinicaltrials.gov ( NCT02533063 ; date of first registration 26/08/2015).
背景：许多身体受限、居住在住宅护理公寓的老年人无法站立运动，存在肌肉功能下降的风险，导致跌倒和受伤。需要寻找新的方法来获得运动益处。本研究旨在测试半卧位振动运动对居住在住宅护理公寓（RCAC）的老年人肌肉功能的影响。
方法：采用随机交叉设计，检查半卧位振动运动对 32 名身体受限的 RCAC 居民（平均年龄 87.5 岁）肌肉功能和质量的影响。参与者接受了两种研究条件的随机序列：假振动或振动，每种条件各 8 周，中间间隔 4 周洗脱期。在振动治疗和假振动治疗的 8 周前后，使用肌肉机械图评估肌肉功能，包括跳跃力、体重校正跳跃力和跳跃高度。还使用短体物理性能测试（SPPB）和手握力来测量肌肉功能。生物电阻抗光谱法用于估计骨骼肌质量。通过混合效应线性回归模型分析振动治疗对肌肉结果的影响。
结果：与假振动相比，振动运动导致跳跃高度提高（p<.05），但坐起表现更差（p=0.012）。其他肌肉功能测试和肌肉质量参数没有显示出显著变化。
结论：这项小型初步研究未能得出关于半卧位振动运动对 RCAC 中老年人肌肉功能和质量影响的明确结论。然而，跳跃性能提高的积极信号可以用于支持更大规模、更长时间、不同振动剂量的研究，以确定振动运动对运动能力有限、高风险、身体受损的老年人的益处。
试验注册：该研究在 clinicaltrials.gov 注册（NCT02533063；首次注册日期 2015 年 8 月 26 日）。
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