Immediate effects of Thai foot massage on renal blood flow, psychological stress, and heart rate variability in community-dwelling older adults: a randomized controlled trial

Yada Thadanatthaphak, J. Kanpittaya, Wittawat Takong, Sutin Chanaboon, Kukiat Tudpor
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Abstract

Background Renal blood flow (RBF) is regulated by an autonomic nervous system and is reduced in older adults. Massage has been previously found to increase blood flow. Objective This two-armed double-blind, randomized controlled trial aimed to investigate the immediate effects of Thai foot massage (TFM) on RBF, psychological stress, and heart rate variability (HRV) in older adult persons. Material and Methods The 26 healthy older adult volunteers were recruited and randomly assigned to the TFM group (13 persons) and the control group (13 persons). The TFM group received a 15-minute Thai foot massage, and the control group received a 15-minute bed rest. Primary outcomes – RBF parameters [peak systolic velocity (PSV), end-diastolic velocity (EDV), resistive index (RI), volumetric arterial blood flow (VF)] and secondary outcomes – HRV parameters [standard deviation of the normal-to-normal intervals (SDNN), root mean square of successive differences (RMSSD), high frequency (HF), low frequency (LF), and low frequency per high frequency (LF/HF)] were measured after each intervention. Results Results showed that the VF significantly increased after TFM (P < 0.05) but not in control. Meanwhile, the stress index significantly reduced after TFM (P < 0.05). SDNN and RMSSD, the proxies of parasympathetic activity, also significantly increased in the TFM group (p < 0.05). Only RMSSD was significantly enhanced in the control group. No side effects were observed. Conclusion The TFM could increase RBF and alleviate psychological stress through parasympathetic activity actuation. Therefore, this intervention might improve RBF and relieve stress in the older population. Further study should be carried out on a larger population.
泰式足部按摩对社区老年人肾血流量、心理压力和心率变异性的即时影响:随机对照试验
背景 肾血流量(RBF)由自主神经系统调节,老年人的肾血流量会减少。以前曾发现按摩能增加血流量。目的 该双臂双盲随机对照试验旨在研究泰式足底按摩(TFM)对老年人 RBF、心理压力和心率变异性(HRV)的直接影响。材料与方法 试验招募了 26 名健康的老年志愿者,并将他们随机分配到泰式足底按摩组(13 人)和对照组(13 人)。TFM 组接受 15 分钟泰式足部按摩,对照组卧床休息 15 分钟。每次干预后都测量了主要结果--RBF 参数[收缩峰值速度 (PSV)、舒张末期速度 (EDV)、阻力指数 (RI)、动脉血流容积 (VF)]和次要结果--心率变异参数[正常到正常间期的标准偏差 (SDNN)、连续差值的均方根 (RMSSD)、高频 (HF)、低频 (LF) 和低频/高频 (LF/HF)]。结果 结果显示,TFM 后 VF 明显增加(P < 0.05),而对照组没有增加。同时,压力指数在 TFM 后明显降低(P < 0.05)。副交感神经活动的代表指标 SDNN 和 RMSSD 在 TFM 组也明显增加(P < 0.05)。对照组中只有 RMSSD 有明显增强。未观察到副作用。结论 TFM 可通过激活副交感神经活动增加 RBF 并缓解心理压力。因此,这种干预措施可能会改善 RBF 并缓解老年人群的压力。应在更大范围的人群中开展进一步研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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