The Journal of The Japanese Society of Balneology, Climatology and Physical Medicine
Online ISSN : 1884-3697
Print ISSN : 0029-0343
ISSN-L : 0029-0343
The Effect of Mist Bathing on the Scalp Blood
Koichiro YAMADATomihiro SHIMIZU
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2008 Volume 71 Issue 3 Pages 167-172

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Abstract

Purpose
In recent years, relatively high humidity (100%) and low temperature (40°C) sauna systems called mist saunas have become popular for homes. It is reported that the impact of differing bathing conditions-namely tub bathing and mist sauna bathing-on the circulation of blood in the scalp have been verified in order to clarify the effects of mist sauna on scalp hair: a characteristic of concern to many men.
Method
The testing was performed on 8 healthy men in their twenties (average age: 23.6, average weight: 61.8kg, average height: 166cm). Bathing conditions were mist sauna at 40°C for 10 minutes and full body bathing at 40°C for 10 minutes. Blood circulation in the scalp was observed at the top of their heads using a laser Doppler blood flow meter attached to head gear. At the same time, the skin temperature and local perspiration on their foreheads were measured.
Results and conclusions
Immediately after beginning bathing, the blood flow rose significantly higher during full body bathing than during the mist sauna. No change was observed as full body bathing continued, but during the mist sauna, the blood flow gradually increased until ultimately the blood flow was much higher during the mist sauna than during full body bathing. Based on this result, it is assumed that the increase of scalp blood flow during full body bathing was caused by hydrostatic pressure, and the increase caused by the mist sauna was the result of the heat effects.

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