| Effects of posture on cardiovascular responses to lower body positive pressure at rest and during dynamic exercise. | |
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MedLine Citation:
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PMID: 9655770 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We tested the hypothesis that cardiovascular responses to lower body positive pressure (LBPP) would be dependent on the posture of the subject and also on the background condition (rest or exercise). We measured heart rate (HR), mean arterial blood pressure (MAP), and cardiac stroke volume in eight subjects at rest and during cycle ergometer exercise (76 +/- 3 W) with and without LBPP (25, 50, and 75 mmHg) in the supine and upright positions. At rest, the increase in MAP was proportional to the increase in LBPP and was greater in the supine (6 +/- 2, 15 +/- 3, and 26 +/- 3 mmHg) than in the upright (2 +/- 3, 9 +/- 3, and 17 +/- 3 mmHg) position. During dynamic exercise, the increases in MAP evoked by 25, 50, and 75 mmHg LBPP were greater in the supine (13 +/- 2, 28 +/- 3, and 40 +/- 3 mmHg) than in the upright (7 +/- 3, 12 +/- 3, and 25 +/- 3 mmHg) position. We conclude that the systemic pressure response to LBPP is clearly dependent on the body position, with the larger pressure responses being associated with the supine position both at rest and during dynamic leg exercise. |
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Authors:
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T Nishiyasu; K Nagashima; E R Nadel; G W Mack |
Publication Detail:
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Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 85 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1998 Jul |
Date Detail:
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Created Date: 1998-08-17 Completed Date: 1998-08-17 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8502536 Medline TA: J Appl Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 160-7 Citation Subset: IM; S |
Affiliation:
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The John B. Pierce Laboratory, Yale University, New Haven, Connecticut 06519, USA. take1@po.yb.cc.yamaguchi-u.ac.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Blood Pressure / physiology Cardiac Output / physiology Exercise / physiology* Exercise Test Female Heart Rate / physiology Hemodynamics / physiology* Humans Male Plethysmography Posture / physiology* Pressure Reflex / physiology Rest / physiology* Vascular Resistance / physiology |
| Grant Support | |
ID/Acronym/Agency:
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HL-20634/HL/NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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