Document Detail

Hemodynamic and respiratory concomitants of learned heart rate control during exercise.
MedLine Citation:
PMID:  1946888     Owner:  NLM     Status:  MEDLINE    
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.
B T Engel; M I Talan
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Psychophysiology     Volume:  28     ISSN:  0048-5772     ISO Abbreviation:  Psychophysiology     Publication Date:  1991 Mar 
Date Detail:
Created Date:  1991-12-06     Completed Date:  1991-12-06     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  0142657     Medline TA:  Psychophysiology     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  225-30     Citation Subset:  IM; S    
Laboratory of Behavioral Sciences, NIA Gerontology Research Center, Baltimore, MD 21224.
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MeSH Terms
Biofeedback, Psychology / physiology*
Blood Pressure / physiology*
Carbon Dioxide / blood
Heart Rate / physiology*
Macaca mulatta
Oxygen / blood
Physical Conditioning, Animal*
Respiration / physiology*
Reg. No./Substance:
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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