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International Journal of Biometeorology

, Volume 41, Issue 3, pp 132–136 | Cite as

The effect of exposure to negative air ions on the recovery of physiological responses after moderate endurance exercise

  • T. Ryushi
  • Ichirou Kita
  • Tomonobu Sakurai
  • Mikinobu Yasumatsu
  • Masanori Isokawa
  • Yasutugu Aihara
  • Kotaro Hama
ORIGINAL ARTICLE

Abstract

 This study examined the effects of negative air ion exposure on the human cardiovascular and endocrine systems during rest and during the recovery period following moderate endurance exercise. Ten healthy adult men were studied in the presence (8,000–10,000 cm−3) or absence (200–400 cm−3) of negative air ions (25° C, 50% humidity) after 1 h of exercise. The level of exercise was adjusted to represent a 50–60% load compared with the subjects’ maximal oxygen uptake, which was determined using a bicycle ergometer in an unmodified environment (22–23° C, 30–35% humidity, 200–400 negative air ions·cm−3). The diastolic blood pressure (DBP) values during the recovery period were significantly lower in the presence of negative ions than in their absence. The plasma levels of serotonin (5-HT) and dopamine (DA) were significantly lower in the presence of negative ions than in their absence. These results demonstrated that exposure to negative air ions produced a slow recovery of DBP and decreases in the levels of 5-HT and DA in the recovery period after moderate endurance exercise. 5-HT is thought to have contributed to the slow recovery of DBP.

Key words Negative air ions Cardiovascular system Serotonin Dopamine 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • T. Ryushi
    • 1
  • Ichirou Kita
    • 1
  • Tomonobu Sakurai
    • 1
  • Mikinobu Yasumatsu
    • 1
  • Masanori Isokawa
    • 1
  • Yasutugu Aihara
    • 1
  • Kotaro Hama
    • 2
  1. 1.Department of Exercise and Sports Science, Faculty of Science, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji-shi, Tokyo 192-03, JapanJP
  2. 2.Geochto Ltd., 4-2 Koujimachi, Chiyoda-ku, Tokyo 102, JapanJP

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