Kokyu to Junkan Volume 55, Issue 12 (December 2007)

Effect of Short Term Tonic Vibration in Agonist Muscle on Autonomic Nervous Modulation in Elderly Novice Tai Chi Practitioners Mitsuko Hasegawa 1 , Takashi Harada 2 , Masuo Muro 2 1School of Nursing, Faculty of Medicine, Toho University 2School of Medicine, Faculty of Medicine, Toho University Keyword: 太極拳初心者高齢者 , 振動刺激 , 自律神経活動 , elderly novice Tai Chi practitioners , vibration stimuli , autonomic nervous activity pp.1375-1380
Published Date 2007/12/15
DOI https://doi.org/10.11477/mf.1404100947
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 The purpose of this study was to examine the effect of tonic vibration stimuli(TV) before Tai Chi Hachidannishiki(Eight Movement Tai Chi: TC8) on the autonomic nervous modulation in elderly novice Tai Chi practitioners.

 Methods: Seventeen elderly people were recruited from regularly train in novice Tai Chi classes in this study. They were divided into two groups, nine subjects were vibration group(TVS), aged 67.8±1.9 yr. and eight subjects were control group(CONT), aged 68.3±5.1 yr. TVS was given stimuli(50~60Hz) on each quadriceps muscles alternatively twelve times for 5 seconds per time. This protocol was performed once a day, six days a week for four weeks. Ramp load exercise was performed before and one month after TC8 training in all subjects. And FVC; FEV1.0; knee extension effort force; hemodynamics(blood pressure, mean blood pressure, SpO2); HRV(time and frequency domain); VO2 kinetic response, VE and HR responses during ramp pedaling exercise were measured.

 Results: In TVS there was a significant increase in %VC and %FEV one month after the experiment(p<0.05). No correlation was observed in CONT. HRV-frequency domain total power(TP) and low frequency power(LFP) increased in both groups one month after TC8 training. High frequency power(HFP) increase in CONT, but decreased in TVS. LFP/HFP ratio increased in CONT and also increased significantly in TVS(p<0.05). Also, HFP/TP ratio increased in CONT but decreased significantly in TVS (p<0.05) under quiet condition.

 Conclusion: Vibration stimuli in quadriceps muscle before exercise enhanced balance of sympathovagal modulation and decreased parasympathetic activity during exercise in elderly novice Tai Chi practitioners. These results suggest that TC8 and tonic muscle vibration stimuli might be an effective way to simulate muscle and promote health in elderly people.

Copyright © 2007, Igaku-Shoin Ltd. All rights reserved.


55巻12号 (2007年12月)
電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院