Effect of exercise level on ventilatory adaptation to respirator use

Philip Harber, Steven Shimozaki, Thomas Barrett, Gil Fine

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


The effect of exercise on the adaptation to an air-purifying respirator type load (dead space + inspiratory resistance) was studied in a group of 18 volunteers with a rapidly incremental exercise protocol. The difference between loaded and unloaded breathing at each exercise level was determined for each subject for a series of parameters describing the ventilatory work to overcome the respirator load pattern of breathing and metabolic work. Linear regression and t tests determined the average effect of the respirator load and the extent to which this effect was affected by the level of exercise. The inspiratory time and duty cycle were increased by the load, and exercise did not significantly affect the magnitude of this adaptation. High exercise did, however, increase the magnitude of the effect of the respiratory load on ventilatory work. These findings suggest that constraints to respiratory pattern adjustment, which may decrease respirator tolerance, occur at high exercise levels.

Original languageEnglish (US)
Pages (from-to)1042-1046
Number of pages5
JournalJournal of Occupational Medicine
Issue number10
StatePublished - Oct 1990
Externally publishedYes

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


Dive into the research topics of 'Effect of exercise level on ventilatory adaptation to respirator use'. Together they form a unique fingerprint.

Cite this