Document Detail


Determinants of fast marathon performance: low basal sympathetic drive, enhanced postcompetition vasodilatation and preserved cardiac performance after competition.
MedLine Citation:
PMID:  18203868     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To test the hypothesis that enhanced postexercise vasodilatation is related to sympathetic drive to resistance vessels and to fast marathon performance.
DESIGN: Prospective field study before and after running a marathon.
PARTICIPANTS: 51 healthy amateur runners who volunteered to participate. The fastest competitor finished fourth, the slowest 1290 th out of 1324 participants.
INTERVENTIONS: None.
MAIN OUTCOME MEASUREMENTS: Competition time, beat-to-beat blood pressure by the vascular unloading technique, oscillometric blood pressure, beat-to-beat stroke volume by impedance cardiography, total peripheral resistance changes calculated from blood pressure and stroke volume changes, sympathetic modulation of vasomotor tone and parasympathetic modulation of sinus node function by spectral analysis of blood pressure and heart rate variability, baroreceptor reflex sensitivity by the sequence method.
RESULTS: Slow performers, in contrast to fast performers, exhibited a higher 0.1 Hz band of diastolic blood pressure variability before the competition (0.1 Hz BPV) (40.0 (SD 2.39) vs 54.9 (2.47), p<0.001), diminished vasodilatation (-11.3 (4.78) vs -29.4 (3.23), p<0.01) and a decrease in stroke index (-14.9 (3.55) vs +0.9 (3.37), p<0.001) in response to the race. Single and multiple regression analyses further corroborated the findings.
CONCLUSIONS: Fast performance in the marathon is associated with low sympathetic modulation of vasomotor tone, maintained stroke index postcompetition and enhanced exercise-induced vasodilatation. We postulate that maintaining a low level of sympathetic modulation to resistance vessels during the course of training may indicate its appropriateness, thus enabling fast performance by optimal postexercise vasodilatation and by prevention of postcompetition cardiac dysfunction. This will have to be tested in future longitudinal studies.
Authors:
G Gratze; H Mayer; F C Luft; F Skrabal
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Publication Detail:
Type:  Journal Article     Date:  2008-01-18
Journal Detail:
Title:  British journal of sports medicine     Volume:  42     ISSN:  1473-0480     ISO Abbreviation:  Br J Sports Med     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-07     Completed Date:  2009-04-06     Revised Date:  2010-12-16    
Medline Journal Info:
Nlm Unique ID:  0432520     Medline TA:  Br J Sports Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  882-8     Citation Subset:  IM    
Affiliation:
Department of Internal Medicine, Krankenhaus der Barmherzigen Brüder, Teaching Hospital of Medical University Graz, Marschallgasse 12, 8020 Graz, Austria.
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MeSH Terms
Descriptor/Qualifier:
Adult
Athletic Performance / physiology*
Baroreflex / physiology*
Blood Pressure / physiology*
Cardiography, Impedance
Competitive Behavior / physiology
Humans
Male
Middle Aged
Prospective Studies
Regression Analysis
Running / physiology*
Stroke Volume / physiology*
Vascular Resistance / physiology
Vasodilation / physiology*
Young Adult
Comments/Corrections
Erratum In:
Br J Sports Med. 2009 Apr;43(4):310-1

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


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