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Physiological and psychological adaptation to respiratory protective devices
Aviation, Space, and Environmental Medicine
|July 1, 1982
Summary
Working with respiratory protective devices (RPDs) near maximum capacity daily leads to rapid physiological adaptation. Improvements were observed in physical metrics, not subjective feelings, indicating enhanced performance with RPD use.
Area of Science:
- Physiology
- Occupational Health
Background:
- Respiratory protective devices (RPDs) are crucial for protecting individuals in hazardous environments.
- Understanding the human body's adaptation to RPDs is essential for optimizing their use and user comfort.
Purpose of the Study:
- To investigate the physiological and subjective adaptation processes to wearing a specific type of RPD.
- To determine the effects of prolonged, high-intensity use of RPDs on the human body.
Main Methods:
- Twenty healthy subjects participated in a 6-day study.
- Subjects performed exercise at 80% of their maximal oxygen uptake (Vo2 max) while wearing a fitted RPD.
- The RPD imposed an airway resistance of 2.80 +/- 0.07 cm H2O s/L.
Main Results:
- A rapid adaptation process to RPD use was observed.
- Physiological parameters showed significant improvement over the 6-day period.
- Subjective sensations did not demonstrate a similar improvement, indicating a dissociation between physical and perceived adaptation.
Conclusions:
- Daily work at high capacity with RPDs induces rapid physiological adaptation.
- The adaptation is primarily reflected in objective physiological changes rather than subjective user experience.
- These findings suggest that users can acclimate to RPDs through consistent, demanding use, leading to improved physical tolerance.