George, KP, Grant, MC, Davies, B and Baker, JS (2014) The impact of short duration, high intensity exercise on cardiac troponin release. Clinical Physiology and Functional Imaging. ISSN 1475-097X

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Abstract

The aim of this study was to assess the appearance of cardiac troponins (cTnI and/or cTnT) after a short bout (30 s) of 'all-out' intense exercise and to determine the stability of any exercise-related cTnI release in response to repeated bouts of high intensity exercise separated by 7 days recovery. Eighteen apparently healthy, physically active, male university students completed two all-out 30 s cycle sprint, separated by 7 days. cTnI, blood lactate and catecholamine concentrations were measured before, immediately after and 24 h after each bout. Cycle performance, heart rate and blood pressure responses to exercise were also recorded. Cycle performance was modestly elevated in the second trial [6·5% increase in peak power output (PPO)]; there was no difference in the cardiovascular, lactate or catecholamine response to the two cycle trials. cTnI was not significantly elevated from baseline through recovery (Trial 1: 0·06 ± 0·04 ng ml(-1) , 0·05 ± 0·04 ng ml(-1) , 0·03 ± 0·02 ng ml(-1) ; Trial 2: 0·02 ± 0·04 ng ml(-1) , 0·04 ± 0·03 ng ml(-1) , 0·05 ± 0·06 ng ml(-1) ) in either trial. Very small within subject changes were not significantly correlated between the two trials (r = 0·06; P>0·05). Subsequently, short duration, high intensity exercise does not elicit a clinically relevant response in cTnI and any small alterations likely reflect the underlying biological variability of cTnI measurement within the participants.

Item Type:	Article
Additional Information:	This is the peer reviewed version of the following article: George, K. P., Grant, M. C., Davies, B. and Baker, J. S. (2014), The impact of short duration, high intensity exercise on cardiac troponin release. Clinical Physiology and Functional Imaging, which has been published in final form at http://dx.doi.org/10.1111/cpf.12225. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Uncontrolled Keywords:	1116 Medical Physiology
Subjects:	R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Sport & Exercise Sciences
Publisher:	Wiley
Related URLs:	Author
Date Deposited:	11 Mar 2016 15:37
Last Modified:	04 Sep 2021 13:13
DOI or ID number:	10.1111/cpf.12225
URI:	https://researchonline.ljmu.ac.uk/id/eprint/3178

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