| Effect of differences in post-exercise lactate accumulation in athletes' haemodynamics. | |
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MedLine Citation:
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PMID: 16900232 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To verify the relationship between exercise intensity and post-exercise haemodynamics, we studied haemodynamic and lactate responses during 10 min following 3 bicycle tests. Two tests were performed for 3 min at 70% and 130% of the workload corresponding to anaerobic threshold (70% W(at) and 130% W(at) tests), and 1 was performed until exhaustion at 150% of the maximum workload achieved during a previous incremental test (150% W(max) test). During the recovery period after the 150% W(max) test we observed the highest increases in blood lactate with respect to the baseline: at the 9th minute of recovery lactate concentration increased by +9.3 +/- 2.7, +6.4 +/- 3.1, and +1.1 +/- 0.9 mmol x L(-1) in the 150% W(max) (p > 0.05 with respect to the other protocol sessions), 130% W(at), and 70% W(at) tests, respectively. We also observed greater reductions in cardiac pre-load and systemic vascular resistance in the 150% W(max) test than in the 130% W(at) and 70% W(at) tests. However, the cardiac output response successfully faced the increased vasodilatation occurring during 150% W(max) test so that changes in mean blood pressure were similar in the 3 test conditions. This study shows that exercises that yielded different lactate concentrations also led to greater vasodilatation. Nevertheless, mechanisms controlling the cardiovascular apparatus successfully prevented a drop in blood pressure in spite of the cardiovascular stress. |
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Authors:
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Antonio Crisafulli; Filippo Tocco; Gianluigi Pittau; Luigi Lorrai; Cristina Porru; Enrico Salis; Pasquale Pagliaro; Franco Melis; Alberto Concu |
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: Applied physiology, nutrition, and metabolism = Physiologie appliquée, nutrition et métabolisme Volume: 31 ISSN: 1715-5312 ISO Abbreviation: - Publication Date: 2006 Aug |
Date Detail:
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Created Date: 2006-08-10 Completed Date: 2006-10-24 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 101264333 Medline TA: Appl Physiol Nutr Metab Country: Canada |
Other Details:
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Languages: eng Pagination: 423-31 Citation Subset: IM |
Affiliation:
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Department of Science Applied to Biological Systems, Section of Human Physiology, University of Cagliari, via Porcell 4, 09124 Cagliari, Italy. crisafulli@tiscali.it |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Blood Pressure Cardiac Output Exercise / physiology* Heart Rate Hemodynamics / physiology* Humans Lactic Acid / blood* Male Oxygen Consumption Sports / physiology* Stroke Volume Vascular Resistance Vasodilation |
| 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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