Effect of acute exercise-induced fatigue on maximal rate of heart rate increase during submaximal cycling

Thomson, Rebecca L. and Rogers, Daniel K. and Howe, Peter R. C. and Buckley, Jonathan D. (2016) Effect of acute exercise-induced fatigue on maximal rate of heart rate increase during submaximal cycling. Research in Sports Medicine, 24 (1). pp. 1-15. ISSN 1543-8627

Abstract

Different mathematical models were used to evaluate if the maximal rate of heart rate (HR) increase (rHRI) was related to reductions in exercise performance resulting from acute fatigue. Fourteen triathletes completed testing before and after a 2-h run. rHRI was assessed during 5 min of 100-W cycling and a sigmoidal (rHRIsig) and exponential (rHRIexp) model were applied. Exercise performance was assessed using a 5-min cycling time-trial. The run elicited reductions in time-trial performance (1.34 ± 0.19 to 1.25 ± 0.18 kJ · kg-1, P < 0.001), rHRIsig (2.25 ± 1.0 to 1.14 ± 0.7 beats · min-1 · s-1, P < 0.001) and rHRIexp (3.79 ± 2.07 to 1.98 ± 1.05 beats · min-1 · s-1, P = 0.001), and increased pre-exercise HR (73.0 ± 8.4 to 90.5 ± 11.4 beats · min-1, P < 0.001). Pre-post run difference in time-trial performance was related to difference in rHRIsig (r = 0.58, P = 0.04 and r = 0.75, P = 0.003) but not rHRIexp (r = -0.04, P = 0.9 and r = 0.27, P = 0.4) when controlling for differences in pre-exercise and steady-state HR. rHRIsig was reduced following acute exercise-induced fatigue, and correlated with difference in performance.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 01 Jun 2017 06:59
Last Modified: 01 Jun 2017 06:59
Uncontrolled Keywords: heart rate kinetics, athletic performance, exercise-induced fatigue, heart rate response, exercise onset
Fields of Research : 11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110604 Sports Medicine
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970111 Expanding Knowledge in the Medical and Health Sciences
Identification Number or DOI: 10.1080/15438627.2015.1076414
URI: http://eprints.usq.edu.au/id/eprint/31566

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