title: The Influence of Exercise Intensity on Postexercise Baroreflex Sensitivity.
abstract: OBJECTIVE
  The purpose of this study was to investigate the influence of exercise intensity on postexercise supine and tilt baroreflex sensitivity (BRS).
  
  
  METHODS
  Nine healthy, active men performed 2 conditions of interval cycling of 40% maximal work rate (WRmax) and 75% WRmaxof matched work done and a control condition of no exercise in a counterbalanced order. BRS outcome measures were determined at preexercise and postexercise up to +24 hr in supine and tilt positions. R-R interval and blood pressure data were collected over consecutive 10-min periods and were analyzed by Fast Fourier transformation analysis.
  
  
  RESULTS
  A fully repeated analysis of variance revealed a significant interaction (p < .05) between time and condition in supine for BRSαLF, F(3, 134) = 5.19, p < .05, ES = .39, and BRSTFTG, F(3, 134) = 5.65, p < .05, ES = .41, and in tilt for BRSUpUp, F(3, 134) = 3.54, p < .05, ES = .31, BRSDownDown, F(3, 134) = 5.94, p < .05, ES = .43, BRSαLF, F(4, 134) = 6.23, p < .05, ES = .44, and BRSTFTG, F(4, 134) = 9.22, p < .05, ES = .54. There were significant differences (p < .05) between condition comparisons at +15 min and between control and 75% WRmaxand between the 40% WRmaxand 75% WRmaxconditions at +60 min. At +15 min, BRS was lower in the 75% WRmaxcondition compared with the 40% WRmaxcondition and the control condition, and it was lower in the 40% WRmaxcondition than in the control condition.
  
  
  CONCLUSIONS
  The findings demonstrate an intensity-dependent relationship in the BRS response following exercise.
authors.affiliation: a University of Gloucestershire.
authors.forename: Linda J
authors.initials: LJ
authors.lastname: Reynolds
authors.affiliation: a University of Gloucestershire.
authors.forename: Mark B A
authors.initials: MB
authors.lastname: De Ste Croix
authors.affiliation: a University of Gloucestershire.
authors.forename: David V B
authors.initials: DV
authors.lastname: James
mesh_terms: D000328:Adult; D017704:Baroreflex / Q000502:physiology*; D001642:Bicycling / Q000502:physiology; D001794:Blood Pressure / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology; D055815:Young Adult
keywords: Cardiovascular response; exercise testing; physical activity