Document Detail


Effect of differences in post-exercise lactate accumulation in athletes' haemodynamics.
MedLine Citation:
PMID:  16900232     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
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.
Authors:
Antonio Crisafulli; Filippo Tocco; Gianluigi Pittau; Luigi Lorrai; Cristina Porru; Enrico Salis; Pasquale Pagliaro; Franco Melis; Alberto Concu
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Applied physiology, nutrition, and metabolism = Physiologie appliquée, nutrition et métabolisme     Volume:  31     ISSN:  1715-5312     ISO Abbreviation:  -     Publication Date:  2006 Aug 
Date Detail:
Created Date:  2006-08-10     Completed Date:  2006-10-24     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  101264333     Medline TA:  Appl Physiol Nutr Metab     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  423-31     Citation Subset:  IM    
Affiliation:
Department of Science Applied to Biological Systems, Section of Human Physiology, University of Cagliari, via Porcell 4, 09124 Cagliari, Italy. crisafulli@tiscali.it
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MeSH Terms
Descriptor/Qualifier:
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:
50-21-5/Lactic Acid

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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