Heart Rate Variability In Athletes And Nonathletes At Rest And During Head-up Tilt.

dc.creatorMartinelli, F S
dc.creatorChacon-Mikahil, M P T
dc.creatorMartins, L E B
dc.creatorLima-Filho, E C
dc.creatorGolfetti, R
dc.creatorPaschoal, M A
dc.creatorGallo-Junior, L
dc.date2005-Apr
dc.date2015-11-27T13:02:12Z
dc.date2015-11-27T13:02:12Z
dc.date.accessioned2018-03-29T01:01:01Z
dc.date.available2018-03-29T01:01:01Z
dc.identifierBrazilian Journal Of Medical And Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas / Sociedade Brasileira De Biofísica ... [et Al.]. v. 38, n. 4, p. 639-47, 2005-Apr.
dc.identifier0100-879X
dc.identifier/S0100-879X2005000400019
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/15962191
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/196310
dc.identifier15962191
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1296543
dc.descriptionThe purpose of the present study was to determine if autonomic heart rate modulation, indicated by heart rate variability (HRV), differs during supine rest and head-up tilt (HUT) when sedentary and endurance-trained cyclists are compared. Eleven sedentary young men (S) and 10 trained cyclists (C) were studied. The volunteers were submitted to a dynamic ECG Holter to calculate HRV at rest and during a 70 masculine HUT. The major aerobic capacity of athletes was expressed by higher values of VO2 at anaerobic threshold and peak conditions (P < 0.05). At rest the athletes had lower heart rates (P < 0.05) and higher values in the time domain of HRV compared with controls (SD of normal RR interval, SDNN, medians): 59.1 ms (S) vs 89.9 ms (C), P < 0.05. During tilt athletes also had higher values in the time domain of HRV compared with controls (SDNN, medians): 55.7 ms (S) vs 69.7 ms (C), P < 0.05. No differences in power spectral components of HRV at rest or during HUT were detected between groups. Based on the analysis of data by the frequency domain method, we conclude that in athletes the resting bradycardia seems to be much more related to changes in intrinsic mechanisms than to modifications in autonomic control. Also, HUT caused comparable changes in sympathetic and parasympathetic modulation of the sinus node in both groups.
dc.description38
dc.description639-47
dc.languageeng
dc.relationBrazilian Journal Of Medical And Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas / Sociedade Brasileira De Biofísica ... [et Al.]
dc.relationBraz. J. Med. Biol. Res.
dc.rightsaberto
dc.rights
dc.sourcePubMed
dc.subjectAdult
dc.subjectAutonomic Nervous System
dc.subjectCross-sectional Studies
dc.subjectElectrocardiography, Ambulatory
dc.subjectExercise
dc.subjectExercise Test
dc.subjectHeart Rate
dc.subjectHumans
dc.subjectMale
dc.subjectOxygen Consumption
dc.subjectPhysical Endurance
dc.subjectRest
dc.subjectSinoatrial Node
dc.subjectSports
dc.subjectSupine Position
dc.subjectTilt-table Test
dc.titleHeart Rate Variability In Athletes And Nonathletes At Rest And During Head-up Tilt.
dc.typeArtículos de revistas


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