| Hemodynamic and respiratory concomitants of learned heart rate control during exercise. | |
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MedLine Citation:
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PMID: 1946888 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Each of three monkeys was trained to slow its heart, to exercise (lift weights), and to attenuate the tachycardia of exercise by combining these two skills. During all experiments, heart rate, stroke volume, intra-arterial blood pressure, O2 consumption, and CO2 production were recorded on a beat-to-beat basis. All animals reliably attenuated the tachycardia of exercise, indicating that this expression of central command is, at least in part, a learned motor skill. Double-product (heart rate X systolic pressure) was attenuated during combined sessions relative to exercise only sessions, and heart rate was always lower at similar levels of cardiac output, indicating that under the combined conditions, animals were performing with better cardiac efficiency at comparable levels of mechanical effort. Analyses of O2 consumption, CO2 production, and respiratory quotient (the ratio of CO2 production to O2 consumption) suggested that the animals also might have been delivering more O2 to their working muscles during combined sessions. |
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Authors:
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B T Engel; M I Talan |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Psychophysiology Volume: 28 ISSN: 0048-5772 ISO Abbreviation: Psychophysiology Publication Date: 1991 Mar |
Date Detail:
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Created Date: 1991-12-06 Completed Date: 1991-12-06 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 0142657 Medline TA: Psychophysiology Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 225-30 Citation Subset: IM; S |
Affiliation:
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Laboratory of Behavioral Sciences, NIA Gerontology Research Center, Baltimore, MD 21224. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Biofeedback, Psychology / physiology* Blood Pressure / physiology* Carbon Dioxide / blood Heart Rate / physiology* Macaca mulatta Male Oxygen / blood Physical Conditioning, Animal* Respiration / physiology* |
| Chemical | |
Reg. No./Substance:
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124-38-9/Carbon Dioxide; 7782-44-7/Oxygen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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