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

Effects of expiratory threshold loading during steady-state exercise.

I Goldstein, S Goldstein, J A Urbanetti

    Journal of Applied Physiology
    |November 1, 1975
    PubMed
    Summary

    Expiratory threshold loads (ETL) did not affect the ventilatory response to exercise, even when increasing functional residual capacity (FRC). Changes in mouth pressure with ETL did not reflect inspiratory drive but rather breathing pattern adjustments.

    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

    Ovarian stimulation for fertility treatments and risk of breast cancer: a matched cohort study.

    Human reproduction (Oxford, England)·2021
    Same author

    Inhibition of P210BCR/ABL Expression in K562 Cells by Electroporation with an Antisense Oligonucleotide.

    Leukemia & lymphoma·2016
    Same author

    Novel p53 target genes secreted by the liver are involved in non-cell-autonomous regulation.

    Cell death and differentiation·2015
    Same author

    The onset of p53 loss of heterozygosity is differentially induced in various stem cell types and may involve the loss of either allele.

    Cell death and differentiation·2014
    Same author

    [Problem of early diagnosis in rheumatic diseases; changes in the leukogram and V.S.H. after intradermal injection of streptococcic antigen].

    Probleme de reumatologie·2014
    Same author

    [Prevention of rheumatic diseases in school-age children].

    Probleme de reumatologie·2014

    Area of Science:

    • Physiology
    • Exercise Physiology
    • Respiratory Physiology

    Background:

    • Increased functional residual capacity (FRC) can reduce inspiratory muscle efficiency.
    • Understanding how FRC changes impact the body's response to exercise is crucial for optimizing performance and training.

    Purpose of the Study:

    • To investigate the effect of altering functional residual capacity (FRC) on the ventilatory response during steady-state exercise.
    • To determine if changes in FRC influence exercise performance and breathing patterns.

    Main Methods:

    • Six well-trained adults performed steady-state exercise on a bicycle ergometer at varying intensities (40-95% VO2max).
    • Expiratory threshold loads (ETL) from 5 to 40 cmH2O were applied to manipulate FRC, with inspiratory capacity (IC) measured to assess FRC changes.

    Related Experiment Videos

  • Minute ventilation, respiratory frequency, tidal volume, and mouth occlusion pressure (P0-1) were recorded.

    • Main Results:

    • ETL did not consistently limit exercise performance.
    • At high exercise intensities (>92% VO2max), minute ventilation decreased with increasing ETL, primarily due to reduced respiratory frequency.
    • FRC increased with ETL at moderate exercise intensities but not at maximum intensity; P0-1 increased with ETL, independent of ventilation changes.

    Conclusions:

    • Altering functional residual capacity (FRC) through expiratory threshold loads (ETL) does not significantly affect the ventilatory response to exercise.
    • Changes in mouth occlusion pressure (P0-1) induced by ETL reflect modifications in breathing patterns rather than alterations in central inspiratory drive.