Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Work performance when breathing through different respirator exhalation resistances.

D M Caretti1, W H Scott, A T Johnson

  • 1Respiratory Protection Technology Team, US Army Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD 21010-5424, USA.

AIHAJ : a Journal for the Science of Occupational and Environmental Health and Safety
|September 11, 2001
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Quantifying the Size and Duration of a Microburst-Producing Chorus Region on 5 December 2017.

Geophysical research letters·2022
Same author

Amalgam.

The Dental register·2021
Same author

Statistical Properties of Electron Curtain Precipitation Estimated With AeroCube-6.

Journal of geophysical research. Space physics·2021
Same author

Electron Microburst Size Distribution Derived With AeroCube-6.

Journal of geophysical research. Space physics·2020
Same author

The FIREBIRD-II CubeSat mission: Focused investigations of relativistic electron burst intensity, range, and dynamics.

The Review of scientific instruments·2020
Same author

Cabozantinib use in renal cell carcinoma.

Drugs of today (Barcelona, Spain : 1998)·2017

Wearing respirators with higher expiratory resistance significantly reduces exercise performance and oxygen consumption. No safe threshold for expiratory resistance was identified, impacting respirator design for users.

Area of Science:

  • Occupational Health and Safety
  • Exercise Physiology
  • Respiratory Protective Equipment

Background:

  • Full-facepiece respirators are used in various occupational settings.
  • Expiratory resistance in respirators can affect physiological responses during exercise.
  • Understanding the impact of expiratory resistance is crucial for user safety and performance.

Purpose of the Study:

  • To evaluate the effect of varying levels of expiratory resistance from modified full-facepiece respirators on exercise performance.
  • To determine the relationship between expiratory resistance and physiological parameters like oxygen consumption and ventilation.
  • To identify potential threshold levels of expiratory resistance that do not impact performance.

Main Methods:

  • Fifteen volunteers exercised on a treadmill at 85% of their maximal aerobic capacity.

Related Experiment Videos

  • Participants wore modified full-facepiece respirators with five different levels of expiratory resistance (0.27 to 12.27 cmH2O·s·L−1).
  • Exercise performance time, oxygen consumption, and minute ventilation were measured.

    • Main Results:

    • Exercise performance time decreased linearly with increasing expiratory resistance (R2 = 0.79; p<0.001).
    • No threshold expiratory resistance was found below which performance was unaffected.
    • Oxygen consumption and minute ventilation also decreased linearly with increased resistance, indicating hypoventilation.

    Conclusions:

    • Increased expiratory resistance in full-facepiece respirators significantly impairs exercise performance and leads to hypoventilation.
    • Respirator design should consider user-acceptable performance reductions as the primary limitation for expiratory resistance.
    • Further research may be needed to optimize respirator design for minimal physiological impact during strenuous activity.