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dc.contributor.author | Earnest, C. P. | |
dc.contributor.author | Jurča, Radim | |
dc.contributor.author | Church, T. S. | |
dc.contributor.author | López Chicharro, José | |
dc.contributor.author | Hoyos, J. | |
dc.contributor.author | Lucía Mulas, Alejandro | |
dc.date.accessioned | 2016-08-23T12:43:43Z | |
dc.date.available | 2016-08-23T12:43:43Z | |
dc.date.issued | 2004 | |
dc.identifier.citation | Earnest, C.P., Jurca, R., Church, T.S., Chicharro, J.L., Hoyos, J., & Lucia Mulas, A. (2004). Relation between physical exertion and heart rate variability characteristics in professional cyclists during the Tour of Spain. British Journal of Sports Medicine, 38(5), 568-575. | spa |
dc.identifier.issn | 03063674 | |
dc.identifier.uri | http://hdl.handle.net/11268/5660 | |
dc.description.abstract | Background: Continued exposure to prolonged periods of intense exercise may unfavourably alter neuroendocrine, neuromuscular, and cardiovascular function. Objective: To examine the relation between quantifiable levels of exertion (TRIMPS) and resting heart rate (HR) and resting supine heart rate variability (HRV) in professional cyclists during a three week stage race. Method: Eight professional male cyclists (mean (SEM) age 27 (1) years, body mass 65.5 (2.3) kg, and maximum rate of oxygen consumption (V̇O2MAX) 75.6 (2.2) ml/kg/min) riding in the 2001 Vuelta a España were examined for resting HR and HRV on the mornings of day 0 (baseline), day 10 (first rest day), and day 17 (second rest day). The rest days followed stages 1-9 and 10-15 respectively. HR was recorded during each race stage, and total HR time was categorised into a modified, three phase TRIMPS schema. These phases were based on standardised physiological laboratory values obtained during previous V̇O2MAX testing, where HR time in each phase (phase I = light intensity and less than ventilatory threshold (VT; ∼70% V̇O2MAX); phase II = moderate intensity between VT and respiratory compensation point (RCP; ∼90% V̇O2MAX); phase III = high intensity (>RCP)) was multiplied by exertional factors of 1, 2, and 3 respectively. Results: Multivariate analysis of variance showed that total TRIMPS for race stages 1-9 (2466 (90)) were greater than for stages 10-15 (2055 (65)) (p<0.0002). However, TRIMPS/day were less for stages 1-9 (274 (10)) than for stages 10-15(343 (11)) (p<0.01). Despite a trend to decline, no difference in supine resting HR was found between day 0 (53.2 (1.8) beats/min), day 10 (49.0 (2.8) beats/min), and day 17 (48.0 (2.6) beats/min) (p = 0.21). Whereas no significant group mean changes in HR or HRV indices were noted during the course of the race, significant inverse Pearson product-moment correlations were observed between all HRV indices relative to total TRIMPS and TRIMPS/day accumulated in race stages 10-15. Total TRIMPS correlated with square root of mean squared differences of successive RR intervals (r = -0.93; p<0.001), standard deviation of the RR intervals (r = -0.94; p<0.001), log normalised total power (r = -0.97; p<0.001), log normalised low frequency power (r = -0.79; p<0.02), and log normalised high frequency power (r = -0.94; p<0.001). Conclusion: HRV may be strongly affected by chronic exposure to heavy exertion. Training volume and intensity are necessary to delineate the degree of these alterations. | spa |
dc.description.sponsorship | Sin financiación | spa |
dc.language.iso | eng | spa |
dc.title | Relation between physical exertion and heart rate variability characteristics in professional cyclists during the Tour of Spain | spa |
dc.type | article | spa |
dc.description.impact | 1.259 JCR (2004) Q2, 19/71 Sport sciences | spa |
dc.identifier.doi | 10.1136/bjsm.2003.005140 | |
dc.rights.accessRights | openAccess | spa |
dc.subject.uem | Ciclismo - Entrenamiento | spa |
dc.subject.uem | Fisiología | spa |
dc.subject.unesco | Medicina deportiva | spa |
dc.subject.unesco | Fisiología | spa |
dc.description.filiation | UEM | spa |
dc.relation.publisherversion | http://0-doi.org.busca.uem.es/10.1136/bjsm.2003.00514 0 | spa |
dc.peerreviewed | Si | spa |
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