Journal of Occupational Health
Online ISSN : 1348-9585
Print ISSN : 1341-9145
ISSN-L : 1341-9145
Effects of Breathing Resistance While Inhaling 3% Carbon Dioxide during Steady-State Exercise
Masayoshi TAKAHASHIYoshihiro MANOMasaharu SHIBAYAMANobuo YAMAMI
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1998 Volume 40 Issue 3 Pages 213-217

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Abstract
Effects of breathing resistance while inhaling 30% carbon dioxide during steady-state exercise: Masayoshi TAKAHASHI, et al. National Institute for Resources and Environment-The purpose of the study was to determine the effects of breathing resistance on the human body while inhaling 3% Carbon dioxide and to evaluate the appropriateness of self-contained self-rescuer (SCBA) criteria in the Japan Industrial Standard (JIS). Eight male subjects volunteered for the study and breathed both normal air and 3% carbon dioxide with both low and high breathing resistance during moderate steady-state exercise. The high breathing resistance produced a pressure level that was almost the same as the upper permitted limit for SCBA in the JIS. Increasing the breathing resistance did not cause any significant effect on the human body while breathing normal air but, in the case of 3% carbon dioxide, the high resistance increased end-tidal carbon dioxide significantly and caused strong distress in the test subjects. Based on these results, it is recommended that carbon dioxide levels be kept low to improve human performance while wearin SCBAs.
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