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International Journal of Biometeorology

, Volume 40, Issue 2, pp 107–112 | Cite as

Physical effects of negative air ions in a wet sauna

  • I. Watanabe
  • Hiroshi Noro
  • Yoshinori Ohtsuka
  • Yukio Mano
  • Yuko Agishi
ORIGINAL ARTICLE

Abstract

 The physical effects of negative air ions on humans were determined in an experimental sauna room equipped with an ionizer. Thirteen healthy persons took a wet sauna bath (dry bulb temperature 42° C, relative humidity 100%, 10 min exposure) with or without negative air ions. The subjects were not told when they were being exposed to negative air ions. There were no differences in the moods of these persons or changes in their blood pressures between the two saunas. The surface temperatures of the foreheads, hands, and legs in the sauna with negative ions were significantly higher than those in the sauna without ions. The pulse rates and sweat produced in the sauna with ions were singificantly higher than those in the sauna without ions. The results suggest that negative ions may amplify the effects on humans of the sauna.

Key words Sauna Negative ion Body temperature Cardiovascular function Sweat production 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • I. Watanabe
    • 1
  • Hiroshi Noro
    • 1
  • Yoshinori Ohtsuka
    • 1
  • Yukio Mano
    • 1
  • Yuko Agishi
    • 1
  1. 1.Department of Rehabilitation and Physical Medicine, Hokkaido University School of Medicine, Kita 15, Nishi 7, Sapporo city 060, JapanJP

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