Effect of whole body vibration applied with low level of acceleration on sleep onset-Whole body vibration which utilizes the characteristic frequencies of vibration of electric trains and 1/f fluctuation pattern.

Kitado, Masako; Araki, Kyosuke; Takahashi, Tatsuya; Inbe, Hiroyuki; Yanase, Takuko

doi:10.5100/jje.35.229

Cited by 6 publications

(4 citation statements)

References 5 publications

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“…These findings suggested that short-term exposure to whole-body vibration can cause the fall of wakefulness level. Exposure to whole-body vibration produced the tendency of shortness for Sleep Latency and facilitated state of a parasympathetic nerve prominent 24) . Exposure to whole-body vibration may be effective for falling sleep.…”

Section: Discussionmentioning

confidence: 99%

Effects of Short-Term Exposure to Whole-Body Vibration on Wakefulness Level

et al. 2007

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To investigate the relationships between whole-body vibration and changes in wakefulness,We measured the change of a subjective wakefulness level and electroencephalogram (EEG). Subjects are ten healthy male university students. The subjects were exposed to whole-body vibration with frequency (10 Hz) and acceleration level (0.6 ms -2 r.m.s.) for 12 min in the seated position. Subjective wakefulness level was evaluated using the questionnaire of VASS (Visual Analog Sleepiness Scale) and KSS (The Kwansei Gakuin Sleepiness Scale). For the electroencephalogram (EEG) measurement, AAT (Alpha Attenuation Test) which repeats three times each opened and closed eye for 1 min was conducted. Wakefulness levels were defined as the ratio of mean alpha-wave power during eyes closed versus eyes opened. VASS and KSS increased and subjective level of wakefulness decreased from pre-to post exposure in all subjects, regardless of vibration exposure. The objective wakefulness levels of AAT were reduced at the post-exposure test in all subjects. In the case with exposure to whole-body vibration was a significant difference from the case without exposure to whole-body vibration. It is suggested that a short-term exposure to whole-body vibration may cause a reduction of wakefulness level.

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Section: Discussionmentioning

confidence: 99%

Effects of Short-Term Exposure to Whole-Body Vibration on Wakefulness Level

et al. 2007

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“…Concerning the relationship between vibration frequency and the resonance frequencies of different organs in the human body, frequency-dependent effects have been reported in digestive organs (4)(5) and the spinal cord (3-5 Hz) [7]. However, whether vibration frequency characteristics are associated with a decrease in the wakefulness level has not been determined.…”

Section: Introductionmentioning

confidence: 98%

“…Whole-body vibration is considered to affect health due to the synchronization and amplification of the complex vibration frequencies by the body. Long-term exposure to whole-body vibration has been reported to increase the risk of lower back pain in people operating industrial machines [1][2][3][4]. On the other hand, suitable vibration can produce a positive effect on the human body.…”

Section: Introductionmentioning

confidence: 99%

Effect of Short-term Exposure to Whole Body Vibration in Humans: Relationship between Wakefulness Level and Vibration Frequencies

et al. 2009

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Summary:The purpose of this study was to clarify the influence of different vibration frequencies on wakefulness level. Subjects were 7 healthy male university students aged 21.9±1.6 years (mean). All students were non-smokers. Three exposure conditions were used (10 Hz vibration, 20 Hz vibration, and no vibration). Wholebody vertical vibration was applied to subjects sitting on a car passenger seat using a whole-body vibration shaker (CV-300, Akashi) at a single frequency (10 or 20 Hz) at an acceleration level of 0.3 ms -2 r.m.s. for 24 min. The objective wakefulness level based on EEGs was evaluated in terms of the alpha attenuation coefficient (AAC) obtained by the Alpha Attenuation Test (AAT). As parameters of psychological stress, salivary 3-methoxy-4-hydroxyphenylglycol (MHPG) and homovanillic acid (HVA) were used. The subjective wakefulness level was evaluated using a questionnaire based on the Kwansei Gakuin Sleepiness Scale (KSS), which is a scale developed for the Japanese based on the Stanford Sleepiness Scale (SSS). The KSS score, representing the subjective wakefulness level, decreased after the exposure irrespective of the exposure condition, but the decrease was not significant. The AAC, representing the objective wakefulness level, significantly decreased only after vibration exposure (10 Hz/20 Hz) but did not differ between the two vibration frequencies. No significant changes were observed after exposure to whole-body vibration in MHPG or HVA as parameters of vibration-related stress. The AAC decreased after exposure to whole-body vibration (10 Hz/20 Hz), suggesting a decrease in the wakefulness level. However, no differences were observed in the influence of the two different vibration frequencies test.

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“…Although many studies and the ISO have defined uncomfortable vibration [ 2 – 4 ], few studies have discussed comfortable vibration [ 5 ]. Kitado et al suggested that the vibration of running trains with 1/f fluctuation has a sleep-inducing effect [ 6 , 7 ]. The authors have investigated the relationship between sleeping passengers and the vibration of running trains to identify effective vibration for inducing sleep [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Bed for Investigating Sleep-Inducing Vibration

Kimura

Kuramoto

Inui

et al. 2017

Journal of Healthcare Engineering

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In running cars or trains, passengers often feel sleepy. Our study focuses on this physiological phenomenon. If a machine can reproduce this phenomenon, it is feasible to put a person, such as an insomnia patient or an infant, to sleep without any harmful effects. The results of our previous study suggest that low-frequency vibration induces sleep. This report describes a new mechanical bed for inducing sleep and discusses the effects of different vibration conditions. The new bed has two active DOFs in the vertical and horizontal directions to examine the anisotropy of sensation. The bed includes three main parts: a vertical driver unit, a horizontal driver unit, and a unique 2-DOF counterweight system to reduce driving force and noise. With regard to motion accuracy, the maximum motion error in the vertical direction lifting 75 kg load was only 0.06 mm with a 5.0 mm amplitude of a 0.5 Hz sinusoidal wave. The results of excitation experiments with 10 subjects showed a significant difference in sleep latency between the conditions with vibration and without vibration. Furthermore, the average latency with insensible vibration (amplitude = 2.4 mm) was shorter than that with sensible vibration (amplitude = 7.5 mm). These results suggest the ability of appropriate vibration to induce sleep.

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Effect of whole body vibration applied with low level of acceleration on sleep onset-Whole body vibration which utilizes the characteristic frequencies of vibration of electric trains and 1/f fluctuation pattern.

Cited by 6 publications

References 5 publications

Effects of Short-Term Exposure to Whole-Body Vibration on Wakefulness Level

Effects of Short-Term Exposure to Whole-Body Vibration on Wakefulness Level

Effect of Short-term Exposure to Whole Body Vibration in Humans: Relationship between Wakefulness Level and Vibration Frequencies

Mechanical Bed for Investigating Sleep-Inducing Vibration

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