The influence of exercise intensity on postexercise baroreflex sensitivity

Reynolds, Linda J and De Ste Croix, Mark B and James, David V (2017) The influence of exercise intensity on postexercise baroreflex sensitivity. Research Quarterly for Exercise and Sport, 88 (1). pp. 36-43. ISSN 0270-1367

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Abstract

Purpose: The purpose of this study was to investigate the influence of exercise intensity on postexercise supine and tilt baroreflex sensitivity (BRS). Method: Nine healthy, active men performed 2 conditions of interval cycling of 40% maximal work rate (WRmax) and 75% WRmax of 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% WRmax and between the 40% WRmax and 75% WRmax conditions at +60 min. At +15 min, BRS was lower in the 75% WRmax condition compared with the 40% WRmax condition and the control condition, and it was lower in the 40% WRmax condition than in the control condition. Conclusion: The findings demonstrate an intensity-dependent relationship in the BRS response following exercise.

Item Type: Article
Article Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Research Quarterly for Exercise and Sport on 11/1/2017 (online, available online: http://dx.doi.org/10.1080/02701367.2016.1265640
Uncontrolled Keywords: Cardiovascular response, exercise testing, physical activity
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
R Medicine > RC Internal medicine > RC1200 Sports Medicine
R Medicine > RM Therapeutics. Pharmacology > RM695 Physical medicine. physical therapy including massage, exercise, occupational therapy, hydrotherapy, phototherapy, radiotherapy, thermotherapy, electrotherapy
Divisions: Schools and Research Institutes > School of Sport & Exercise > Sport and Exercise
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: Anne Pengelly
Date Deposited: 23 Nov 2016 09:10
Last Modified: 17 Aug 2017 16:06
URI: http://eprints.glos.ac.uk/id/eprint/4181

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