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Postinversion responses to inversion in normal subjects.

T Boone1, J Hammett

  • 1Department of Physical Education, University of Southern Mississippi, Hattiesburg 39406.

Archives of Physical Medicine and Rehabilitation
|July 1, 1988
PubMed
Summary
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Post-inversion, healthy individuals experience significant decreases in cardiac output and oxygen uptake. Cardiovascular adjustments indicate a safe return to an upright position without major concerns.

Area of Science:

  • Cardiovascular Physiology
  • Exercise Physiology

Background:

  • Understanding cardiovascular responses to postural changes is crucial.
  • Inversion therapy is a practice that involves assuming an inverted position.

Purpose of the Study:

  • To assess cardiac output and cardiovascular adjustments after a five-minute inversion period.
  • To compare pre-inversion (baseline) and post-inversion physiological data in healthy adults.

Main Methods:

  • Noninvasive measurement of cardiac output using the Beckman MMC and CO2 rebreathing.
  • Statistical analysis using ANOVA with repeated measures to compare pre- and post-inversion data.
  • Inclusion of 20 healthy subjects (mean age 22 years).

Main Results:

Related Experiment Videos

  • Significant decreases observed in oxygen uptake, cardiac output, and stroke volume post-inversion.
  • Significant increases noted in arteriovenous oxygen difference, peripheral vascular resistance, and diastolic blood pressure.
  • No significant changes in heart rate, systolic blood pressure, or double product.

    • Conclusions:

    • The cardiovascular system effectively adapts following inversion therapy.
    • The study suggests minimal risk associated with returning to an upright position after inversion.