Effects of closed-circuit breathing apparatus on respiration and metabolism

M. Takahashi, Y. Mano, M. Shibayama, N. Yamami

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The purpose of the study was to evaluate the influence of hyperoxia and hypercapnia on respiration and metabolism during a steady-state exercise. Thirteen healthy subjects were examined during bicycle-ergometer rides at approximately 50% VO2max under four different breathing gas conditions: 1) room air (control); 2) 40% oxygen; 3) 3% carbon dioxide; 4) 40% oxygen and 3% carbon dioxide. Hyperoxia, with or without hypercapnia, decreased respiratory ventilation and carbon dioxide elimination significantly. On the other hand, oxygen uptake in hyperoxia was not significantly different from that of normoxia. Hypercapnia increased respiratory ventilation more than 30% compared to normocapnia, but it did not change oxygen uptake and carbon dioxide elimination significantly.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalSangyō eiseigaku zasshi = Journal of occupational health
Volume40
Issue number1
DOIs
Publication statusPublished - 1998 Jan

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'Effects of closed-circuit breathing apparatus on respiration and metabolism'. Together they form a unique fingerprint.

Cite this