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Int. J. Environ. Res. Public Health 2015, 12(11), 14301-14311; doi:10.3390/ijerph121114301

Exposure to Air Ions in Indoor Environments: Experimental Study with Healthy Adults

1
Institute of Environmental Health, Center for Public Health, , Medical University Vienna, Kinderspitalgasse 15, Vienna 1090, Austria
2
Austrian Institute for Healthy and Ecological Building, Alserbachstraße 5, Vienna 1090, Austria
*
Author to whom correspondence should be addressed.
Academic Editor: Paul B. Tchounwou
Received: 18 June 2015 / Revised: 12 October 2015 / Accepted: 5 November 2015 / Published: 10 November 2015
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Abstract

Since the beginning of the 20th century there has been a scientific debate about the potential effects of air ions on biological tissues, wellbeing and health. Effects on the cardiovascular and respiratory system as well as on mental health have been described. In recent years, there has been a renewed interest in this topic. In an experimental indoor setting we conducted a double-blind cross-over trial to determine if higher levels of air ions, generated by a special wall paint, affect cognitive performance, wellbeing, lung function, and cardiovascular function. Twenty healthy non-smoking volunteers (10 female, 10 male) participated in the study. Levels of air ions, volatile organic compounds and indoor climate factors were determined by standardized measurement procedures. Air ions affected the autonomous nervous system (in terms of an increase of sympathetic activity accompanied by a small decrease of vagal efferent activity): In the test room with higher levels of air ions (2194/cm3 vs. 1038/cm3) a significantly higher low to high frequency ratio of the electrocardiography (ECG) beat-to-beat interval spectrogram was found. Furthermore, six of nine subtests of a cognitive performance test were solved better, three of them statistically significant (verbal factor, reasoning, and perceptual speed), in the room with higher ion concentration. There was no influence of air ions on lung function and on wellbeing. Our results indicate slightly activating and cognitive performance enhancing effects of a short-term exposure to higher indoor air ion concentrations. View Full-Text
Keywords: air ions; cognitive performance; heart rate variability; lung function; indoor air; wellbeing air ions; cognitive performance; heart rate variability; lung function; indoor air; wellbeing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wallner, P.; Kundi, M.; Panny, M.; Tappler, P.; Hutter, H.-P. Exposure to Air Ions in Indoor Environments: Experimental Study with Healthy Adults. Int. J. Environ. Res. Public Health 2015, 12, 14301-14311.

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Int. J. Environ. Res. Public Health EISSN 1660-4601 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
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