| Steady-state acid-base response at exercise levels close to maximum lactate steady state. | |
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MedLine Citation:
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PMID: 16778546 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: To study acid-base status during a constant-load treadmill test at exercise levels close to the maximum lactate steady-state. DESIGN: Two tests were performed: one maximal and one steady-state at a load corresponding to the mean of the two ventilatory thresholds observed in the first test. SETTING: University Sports Science Laboratory. PARTICIPANTS: Twenty-three male Sports Science students, aged 26.7 (+/- 4.9 SD) years, 176.1 (+/- 6.3) cm in height, and weighing 72.8 (+/- 6.7) kg. MAIN OUTCOME MEASURES: Capillary blood gases, metabolites, electrolytes. RESULTS: Acid-base status variables declined significantly during the maximal test. Lactate concentrations were above the values observed at onset of blood lactate accumulation. All the blood variables did not vary significantly at the various experimental times, except pH values and PCO2 values. Bicarbonate concentration remained constant. Plasma potassium, chlorine and sodium concentration did not increase. CONCLUSION: During a steady-state test at a load corresponding to approximately 80% of VO2max, the acid-base status in capillary blood remained constant even though the lactate concentration was over 4 mmol/L. However, despite the maintenance of a constant acid-base status, other physiological variables did not behave in the same fashion. |
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Authors:
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Pedro J B Peinado; Valter Di Salvo; Fabio Pigozzi; Ana I P Bermúdez; Ana B Peinado Lozano; Francisco J Calderón Montero; Nicola Maffulli |
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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: Clinical journal of sport medicine : official journal of the Canadian Academy of Sport Medicine Volume: 16 ISSN: 1050-642X ISO Abbreviation: Clin J Sport Med Publication Date: 2006 May |
Date Detail:
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Created Date: 2006-06-16 Completed Date: 2006-10-31 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9103300 Medline TA: Clin J Sport Med Country: United States |
Other Details:
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Languages: eng Pagination: 244-6 Citation Subset: IM |
Affiliation:
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Facultad de Ciencias de la Actividad Fisica y el Deporte- INEF, Universidad Politécnica de Madrid, Spain. pedroj.benito@upm.es |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acid-Base Equilibrium
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physiology* Adult Anaerobic Threshold / physiology Blood Chemical Analysis Blood Gas Analysis Exercise / physiology* Humans Lactic Acid / blood*, metabolism Male |
| Chemical | |
Reg. No./Substance:
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50-21-5/Lactic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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