Ai Shirota

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This study evaluated the effects of the daytime nap on performance, mood and physiological measures in aged individuals Participants were six healthy aged persons (M=72.2 years old) who habitually napped in the afternoon three or more times a week. They participated under two conditions with an interval of 1 week. In the nap condition, the subjects went to(More)
This study investigated the effects of a short afternoon nap (<30 min) in the elderly on subjective mood, performance and electroencephalograms (EEG). Ten healthy elderly persons who habitually napped in the afternoon three or more times a week participated in the present study. They participated in two experimental conditions with an interval of more than(More)
This study investigates the relationship between the level of daytime activities and nocturnal sleep in the elderly using the wrist actigraph and ambulatory polysomnograph system. Five male and five female subjects (mean age = 73.8+/-3.05 years; range 69-77 years) participated in this study. The level of daytime activity was positively correlated with the(More)
The relationship between the level of volitional lifestyle and nocturnal heart rate (HR) in the elderly was investigated. Twenty high- and low-volitional elderly individuals (n = 10 each; mean age 73.2 years) participated in the study. Heart rate during nocturnal sleep was recorded at their homes using an ambulatory polysomnographic system. High-volitional(More)
The present study investigated the relationship among volitional lifestyle, activity and sleep in the aged. We selected 28 subjects over 65 years of age to survey volition to lifestyle. High-volitional group (14 Ss, mean age: 74.1 years, seven males and seven females) and low-volitional group (14 Ss, mean age: 73.0 years, seven males and seven females) were(More)
Sleep-related problems are prevalent among the aged. The present study examined the influence of a mentally active or "volitional" lifestyle on the rest-activity cycle, nocturnal sleep, and daytime napping in the healthy elderly. 14 aged individuals with a high Volitional lifestyle (M = 74.1 yr. old) and 14 with a Low Volitional lifestyle (M = 73.0 yr. old)(More)
This study investigates the relationship between a volitional lifestyle and sleep-life habits in the aged. High volitional group (HVG: n=45, 26 men and 19 women, mean age 73.0 years) and low-volitional group (LVG: n=45, 27 men and 18 women, mean age 72.2 years) were grouped using the scale of self-confidence. It was found that high volitional aged(More)
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