| Circulatory and muscle metabolic responses to draught work compared to increasing trotting velocities. | |
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MedLine Citation:
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PMID: 3215169 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Circulatory and muscle metabolic responses were studied in 10 horses which all performed incremental draught work at a low trotting speed on a treadmill (D-test) and also exercise with gradually increasing velocities (S-test). Exercise was continued until the horses could no longer maintain the weights above the floor or maintain speed trotting without changing gait to a gallop. Muscle biopsies were taken from the gluteus and the semitendinosus muscles before, and immediately after, exercise. The heart rate (HR) increased linearly with both increasing draught resistance and velocity and reached mean values of 212 and 203 beats/min, respectively. Blood lactate levels increased exponentially to mean values of 12.9 and 7.9 mmol/litre in the two tests. Both HR and blood lactate levels were significantly higher at the cessation of work in the D-test compared to the S-test. The relationship between HR and blood lactate response in the S-test was similar to that in the D-test. The red cell volume was determined after a standardised exercise tolerance test and was significantly correlated both to the weightloading and to the velocity, producing a HR of 200 beats/min. The changes seen in muscle glycogen and glucose-6-phosphate were similar in the two tests, whereas significantly higher lactate levels and lower creatine phosphate and adenosine triphosphate levels were seen in the D-test compared to the S-test. It was concluded that high oxidative capacity is of importance both for fast trotting and for draught work.(ABSTRACT TRUNCATED AT 250 WORDS) |
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Authors:
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M Gottlieb; B Essén-Gustavsson; A Lindholm; S G Persson |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Equine veterinary journal Volume: 20 ISSN: 0425-1644 ISO Abbreviation: Equine Vet. J. Publication Date: 1988 Nov |
Date Detail:
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Created Date: 1989-03-07 Completed Date: 1989-03-07 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0173320 Medline TA: Equine Vet J Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 430-4 Citation Subset: IM; S |
Affiliation:
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Swedish University of Agricultural Sciences, Faculty of Veterinary Medicine, Department of Medicine I, Uppsala. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adenosine Triphosphate
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analysis Animals Creatine Kinase / blood Electrocardiography / veterinary Female Gait Glucose-6-Phosphate Glucosephosphates / analysis Glycogen / analysis Heart Rate Horses / metabolism, physiology* Lactates / analysis, blood Male Muscles / metabolism* Phosphocreatine / analysis Physical Conditioning, Animal* Physical Exertion* Respiration |
| Chemical | |
Reg. No./Substance:
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0/Glucosephosphates; 0/Lactates; 56-65-5/Adenosine Triphosphate; 56-73-5/Glucose-6-Phosphate; 67-07-2/Phosphocreatine; 9005-79-2/Glycogen; EC 2.7.3.2/Creatine Kinase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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