| Influence of intensive cycling training on heart rate variability during rest and exercise. | |
| | |
MedLine Citation:
|
PMID: 14992127 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The current study examined whether changes in heart rate variability (HRV) following intensive cycling training contribute to the mechanism of training-induced bradycardia. Thirteen healthy untrained subjects, ages 18-27 years, underwent recordings of heart rate (HR) and VO2max before and after 8 weeks of cycling, 25-60 min/day, 5 days/week at > 80% maximum HR (HRmax). Heart rate recordings were obtained during supine rest and submaximal exercise and were analysed for the following components of HRV: low frequency (LF, 0.041-0.15 Hz); high frequency (HF, 0.15-0.40 Hz); LF/HF ratio and total power (TP, 0-0.40 Hz). At posttraining, VO2max was significantly increased while HR was significantly reduced at rest and all absolute exercise work rates. Training-induced lower HR was accompanied by significantly greater HF and TP during rest as well as LF, HF, and TP during all absolute exercise work rates. Posttraining HR and the majority of HRV measures were similar to pretraining values at the same relative exercise intensity (% HRmax). These results indicated that 8 weeks of intensive cycling training increased HRV and cardiac vagal modulation during rest and absolute exercise work rates but had little effect during relative exercise work rates. Increased vagal modulation resulting from intensive exercise training may contribute to the mechanism of training-induced bradycardia. |
| | |
Authors:
|
Anthony S Leicht; Graham D Allen; Andrew J Hoey |
Related Documents
:
|
2115437 - Consistency of seizure frequency estimates across time, methods, and observers. 7620297 - The effect of transcutaneous electrical nerve stimulation (tens) on autonomic cardiovas... 16569547 - Prognostic value of heart rate recovery in patients with heart failure. 16930937 - Endothelial function in young subjects with vaso-vagal syncope. 18415117 - Vigorous physical activity and cytokines in adolescents. 3809757 - Effects of hypothalamic lesions on the cardiorespiratory responses to muscular contract... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Canadian journal of applied physiology = Revue canadienne de physiologie appliquée Volume: 28 ISSN: 1066-7814 ISO Abbreviation: Can J Appl Physiol Publication Date: 2003 Dec |
Date Detail:
|
Created Date: 2004-03-02 Completed Date: 2004-04-06 Revised Date: 2004-11-17 |
Medline Journal Info:
|
Nlm Unique ID: 9306274 Medline TA: Can J Appl Physiol Country: United States |
Other Details:
|
Languages: eng Pagination: 898-909 Citation Subset: IM |
Affiliation:
|
Institute of Sport and Exercise Science, James Cook University, Townsville, QLD 4811, Australia. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Adolescent Adult Bicycling / physiology Female Heart Rate / physiology* Humans Male Oxygen Consumption / physiology Physical Education and Training* Rest Statistics, Nonparametric |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Fitness as a determinant of the oxygen uptake/work rate slope in healthy children and children with ...
Next Document: Effects of helium and 40% O2 on graded exercise with self-contained breathing apparatus.