Jove
Visualize
Contact Us

Related Experiment Videos

Positive pressure breathing during rest and exercise.

E A den Hartog1, R Heus

  • 1Thermal Physiology Group, Department of Work Environment, TNO Human Factors, PO Box 23, 3769 ZG Soesterberg, The Netherlands. denhartog@tm.tno.nl

Applied Ergonomics
|March 12, 2003
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

Corrigendum to "Monitoring core temperature of firefighters to validate a wearable non-invasive core thermometer in different types of protective clothing: Concurrent in-vivo validation" [Appl. Ergon. 83 (2020) 103001].

Applied ergonomics·2024
Same author

Monitoring core temperature of firefighters to validate a wearable non-invasive core thermometer in different types of protective clothing: Concurrent in-vivo validation.

Applied ergonomics·2019
Same author

IMPROVED Cr II log(<i>gf</i> ) VALUES AND ABUNDANCE DETERMINATIONS IN THE PHOTOSPHERES OF THE SUN AND METAL-POOR STAR HD 84937.

The Astrophysical journal. Supplement series·2017
Same author

Two-point motional Stark effect diagnostic for Madison Symmetric Torus.

The Review of scientific instruments·2010
Same author

Reliability of an infrared forehead skin thermometer for core temperature measurements.

Journal of medical engineering & technology·2006
Same author

Maximal oxygen uptake during cycling is reduced in moving environments; consequences for motion-induced fatigue.

Ergonomics·2002
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

Commercial respiratory protection systems struggle to maintain positive pressure during heavy exercise. While not impacting ventilation or circulation, using these systems increased oxygen consumption.

Area of Science:

  • Exercise Physiology
  • Respiratory Protection
  • Biomedical Engineering

Background:

  • Maintaining positive pressure in respiratory protection is crucial during strenuous activity.
  • Existing systems may not adequately support physiological demands of heavy exercise.

Purpose of the Study:

  • To investigate the feasibility of maintaining positive pressure with respiratory protection during heavy exercise.
  • To assess the impact on ventilation, circulation, and comfort.
  • To evaluate the effectiveness of commercial blower systems.

Main Methods:

  • Eight male subjects performed exercise at 80% maximum power.
  • A blower system was tested at various capacities and pressure levels (3 and 15 mbar).
  • Mouth pressure feedback was utilized to control the blower.

Related Experiment Videos

Main Results:

  • The blower reduced negative pressure phases during breathing from 50% to 15% but did not eliminate them.
  • Negative pressures persisted across all blower settings during exercise.
  • Positive pressure breathing did not alter ventilation or circulation.
  • Oxygen consumption was elevated when using the blower and respirator.

Conclusions:

  • Current commercial blower systems are insufficient to guarantee positive pressure during intense exercise.
  • Positive pressure breathing did not negatively affect core physiological functions but increased metabolic cost.