| Respiratory, cardiovascular, and metabolic adjustments to exercise in the Hereford calf. | |
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MedLine Citation:
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PMID: 3921517 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Six Hereford steers were studied before, during, and after short exercise bouts on a motor-driven treadmill (3 degrees incline) at four speeds (1.0, 1.4, 1.8, and 2.2 m X s-1). Oxygen consumption (MO2) and carbon dioxide production (MCO2) were measured by collecting the expired gas. Arterial and mixed venous blood samples were obtained simultaneously from indwelling catheters in the aorta and pulmonary artery. A 10-fold increase was observed in MO2 and MCO2 at the highest work load. Minute ventilation increased proportionately less than MO2 and MCO2 with increasing work loads, but alveolar ventilation was found to increase in proportion to both MO2 and MCO2. The highest work load produced a threefold increase in cardiac output primarily as a result of increased heart rate. A 10-fold increase in lactate and a 63% increase in serum potassium concentration were observed at the highest work load. Plasma cortisol levels were highest at 10 min postexercise and reached levels of seven times the resting values following exercise at the highest speed. The responses to exercise in the calf are qualitatively similar to those observed in other species, but quantitative differences exist in some cardiovascular and metabolic responses which may limit this animal's ability to perform strenuous exercise. |
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Authors:
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W D Kuhlmann; D S Hodgson; M R Fedde |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Journal of applied physiology (Bethesda, Md. : 1985) Volume: 58 ISSN: 8750-7587 ISO Abbreviation: J. Appl. Physiol. Publication Date: 1985 Apr |
Date Detail:
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Created Date: 1985-06-19 Completed Date: 1985-06-19 Revised Date: 2008-11-21 |
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: 1273-80 Citation Subset: IM; S |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Blood Chemical Analysis Body Temperature Carbon Dioxide / blood Cardiovascular Physiological Phenomena* Cattle / metabolism, physiology* Hematocrit Hemoglobins / analysis Hydrogen-Ion Concentration Male Oxygen / blood Physical Exertion* Pulmonary Gas Exchange Respiration* |
| Chemical | |
Reg. No./Substance:
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0/Hemoglobins; 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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