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

Position as a variable for cardiovascular responses during exercise.

D L Cotsamire, M J Sullivan, T M Bashore

    Clinical Cardiology
    |March 1, 1987
    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

    Evidence for the Collective Nature of Radial Flow in Pb+Pb Collisions with the ATLAS Detector.

    Physical review letters·2026
    Same author

    Evidence for Longitudinally Polarized W Bosons in the Electroweak Production of Same-Sign W Boson Pairs in Association with Two Jets in pp Collisions at sqrt[s]=13  TeV with the ATLAS Detector.

    Physical review letters·2025
    Same author

    Observation of tt[over ¯] Production in Pb+Pb Collisions at sqrt[s_{NN}]=5.02  TeV with the ATLAS Detector.

    Physical review letters·2025
    Same author

    Search for Dark Matter Produced in Association with a Dark Higgs Boson in the bb[over ¯] Final State Using pp Collisions at sqrt[s]=13  TeV with the ATLAS Detector.

    Physical review letters·2025
    Same author

    Search for Magnetic Monopole Pair Production in Ultraperipheral Pb+Pb Collisions at sqrt[s_{NN}]=5.36  TeV with the ATLAS Detector at the LHC.

    Physical review letters·2025
    Same author

    Simultaneous Unbinned Differential Cross-Section Measurement of Twenty-Four Z+jets Kinematic Observables with the ATLAS Detector.

    Physical review letters·2025
    Same journal

    Real-World National Databases Versus Hypothesis-Driven Cohort Studies: A Reply to the Critique on the TURK-HF Registry Design.

    Clinical cardiology·2026
    Same journal

    Comment on Wang et al.: Unaddressed Multiple Comparisons Risk Inflating Type, Error in Cardiovascular Specialty Nursing Research.

    Clinical cardiology·2026
    Same journal

    Methodological and Statistical Confounding in Comparing Patient-Reported Outcomes Between Cardioversion and Ablation for Atrial Fibrillation.

    Clinical cardiology·2026
    Same journal

    In-Hospital Cardiac Arrest Detection Performance Analysis and Comparison on Effective Feature Selection.

    Clinical cardiology·2026
    Same journal

    Interpreting the Association Between Diuretic Intensity Score and Mortality: The Potential Roles of Diuretic Responsiveness and Mineralocorticoid Receptor Antagonist Therapy.

    Clinical cardiology·2026
    Same journal

    Heart Failure With Preserved Ejection Fraction-Like Phenotype in Coronary Artery Disease and Obstructive Sleep Apnea: Insights From the RICCADSA Cohort.

    Clinical cardiology·2026
    See all related articles

    Body position significantly impacts cardiovascular function and exercise performance. The supine position generally supports greater left ventricular volumes and longer exercise duration compared to the 70-degree upright tilt.

    Area of Science:

    • Cardiovascular Physiology
    • Exercise Physiology

    Background:

    • Body positioning affects cardiovascular dynamics.
    • Understanding positional effects is crucial for interpreting exercise performance metrics.

    Purpose of the Study:

    • To investigate the influence of body position (supine vs. 70-degree upright tilt) on left ventricular size, performance, hemodynamics, and exercise duration.
    • To compare cardiovascular responses at rest and during exercise across different body positions.

    Main Methods:

    • Radionuclide angiography was used to assess left ventricular volumes and ejection fraction at rest and during exercise in supine and 70-degree upright positions.
    • Bicycle ergometry with respiratory gas analysis determined maximal exercise capacity.
    • Hemodynamic parameters including cardiac output and heart rate were monitored.

    Related Experiment Videos

    Main Results:

    • Left ventricular end-diastolic, end-systolic volumes, and stroke volume were significantly larger in the supine position.
    • Cardiac output remained comparable between positions due to compensatory increases in heart rate in the upright tilt position.
    • Exercise duration and workload were highest in the supine and full upright (90-degree) positions, and lowest in the 70-degree tilt position.

    Conclusions:

    • Body position significantly alters resting and exercise cardiovascular parameters.
    • The 70-degree upright tilt position reduces stroke volume and exercise capacity compared to supine and full upright positions.
    • Compensatory heart rate increases in the upright position maintain cardiac output but do not fully offset reduced stroke volume effects on exercise duration.