Document Detail

Pre- and post-season heart rate variability in adolescent cross-country skiers.
MedLine Citation:
PMID:  11001398     Owner:  NLM     Status:  MEDLINE    
To investigate the effects on cardiac autonomic control after a competitive cross-country skiing season, 9 females and 8 males, 16-19 years old, performed tilt-table heart rate variability (HRV) recordings and incremental treadmill tests before (August), and after (April the following year) the most intensive period of training and competition. Spectral analysis of HRV showed increased total variability at rest and reduced low frequency variability in the tilted position (LFtilt) at the second test (P<0.05). The female subgroup showed consistently higher high frequency (HF) and total heart rate variability than males. Total run time (RunT) increased from 18.5+/-1.9 min to 19.4+/-1.7 min (mean+/-SD) in the entire group (P<0.05), while VO2max only showed a non-significant increase (0.05<P<0.10). Submaximal heart rates (HRsubm) were reduced by an average of 4 beats (P<0.01) but maximal HR was unchanged. Performance data suggest a positive training effect. Following training, the increased total HRV the reduced LFtilt (both at rest), and the lower submaximal heart rates indicate an altered control of heart rate both at rest and during exercise. The consistently higher HF and total variability in the females indicate an increased parasympathetic activity in females compared with males.
R Hedelin; U Wiklund; P Bjerle; K Henriksson-Larsén
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Scandinavian journal of medicine & science in sports     Volume:  10     ISSN:  0905-7188     ISO Abbreviation:  Scand J Med Sci Sports     Publication Date:  2000 Oct 
Date Detail:
Created Date:  2000-12-27     Completed Date:  2001-01-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9111504     Medline TA:  Scand J Med Sci Sports     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  298-303     Citation Subset:  IM    
Department of Sports Medicine, Institute of Surgical and Perioperative Science, Umeå University, Sweden.
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MeSH Terms
Analysis of Variance
Competitive Behavior
Exercise Test
Heart Rate*
Physical Fitness / physiology*
Sex Factors
Skiing / physiology*
Statistics, Nonparametric
Tilt-Table Test

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

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