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:The condition of brain of brain activity resulting from pressure exerted on the abdomen by waist belts was evaluated by Electroencephalogram(EEG) measurement. We investigated the possibility of estimating psychological and physiological stress arising from waist belts in clothing based on EEG measurements. Waist belts are daily attire for both men and women and are a requisite when clothing with separate legs are worn. There are many studies to the effect that pressure on the abdomen exerted by clothing is not desirable; however there is hardly any research on the relation between pressure exerted by clothing and brain activity. Moreover there is hardly any research describing the mutual relationships between the following three things: pressure exerted by clothing, feelings of clothing comfort and physiological response. In this study, electrodes were fixed to the scalp and EEG was measured for states of abdomen pressure and non-pressure as exerted by waist belts, with eyes open and with eyes closed. Additionally, sensory tests for sensations of tightness, arousal, and feelings of comfort were carried out. Frequency analysis of measured EEG data was carried out and brain activity as reflected in the intensity of alpha waves under the conditions of pressure exerted by waist belts was evaluated. With eyes open, the intensity of alpha waves decreased significantly under waist-belt pressure in comparison with the intensity of waves in non-pressure conditions. With eyes closed, there was no significant difference in the intensity of alpha waves between the two pressure conditions. It was examined as to whether brain activity might be promoted in accordance with visual information concerning tightening. Additionally, the pressure on the body exerted by clothes has been seen to be a problem not only from the standpoint of sensuous comfort but also in terms of its effects on physiological functioning and health caused by oppressiveness.

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