The Effect on Heart Rate with Local Vibration of the Quadriceps Femoris before Hachidan-nishiki(Eight Movements of Tai Chi) Exercise in Aged People Mitsuko Hasegawa 1 , Miho Tanaka 1 , Reiko Hachigasaki 1 , Masuo Muro 2 1School of Nursing, Faculty of Medicine, Toho University 2School of Medicine, Faculty of Medicine, Toho University Keyword: 低強度運動 , 振動刺激 , 在宅ケア , low level exercise , vibration stimulation , home care pp.1055-1061
Published Date 2007/9/15
DOI https://doi.org/10.11477/mf.1404100893
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 The purpose of this study was to examine the responses in heart rate(HR) during Hachidan-nishiki(H-n) exercise with vibration stimulation of the active muscles before the exercise. Methods: Twelve healthy volunteers〔vibration group(VG)=7, control group(CG)=5〕 were recruited. Subjects were 65-80-year-old men and women living in Tokyo. Subjects performed H-n exercise for about 20 minutes while watching an instruction video. The exercise was performed three times per week for one month at home. The frequency of vibration was 60 Hz before the exercise for five seconds, repeated 12 times on the quadriceps femoris(QF) of the right and left legs, alternately.

 Results: In VG(age=70.7±4.8, BMI=24.7±2.4) both strength of knee extension and HR during exercise significantly increased(p<0.05) after training. In CG(age=70.2±4.3, BMI=24.5±5.6) there was no change. On the other hand,in frequency analysis of RRI, the HF/T ratio tended to increase in both groups after training. This indicates that H-n exercise stimulates parasympathetic activity. Conclusion: These results suggest that optimum cardiovascular response and the improvement of leg strength occur with H-n exercise training in aged people. Stimulation of the active muscle with vibration before exercise elicits afferent effects on the autonomic nervous system. Therefore, vibration stimulation of the QF before exercise is recommended as a highly effective method even for low level exercise.

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