Legaz-Arrese, A, Sitko, S, Cirer-Sastre, R, Mayolas-Pi, C, Jiménez-Gaytán, RR, Orocio, RN, García, RL, Corral, PGM, Reverter-Masia, J, George, K and Carranza-García, LE (2024) The kinetics of cardiac troponin T release during and after 1- and 6-h maximal cycling trials. Journal of Science and Medicine in Sport. ISSN 1440-2440

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Abstract

Objectives: In this study, the effects of short-duration high-intensity exercise and long-duration exercise on high-sensitivity cardiac troponin T (hs-cTnT) levels were compared. Methods: Twelve male amateur cyclists performed 1- and 6-h cycling trials. In both exercise trials, hs-cTnT was assessed at rest, immediately postexercise and at 1, 3, 6, 12, and 24 h postexercise. Additionally, hs-cTnT levels were assessed every hour during the 6-h trial. Results: Exercise resulted in an increase in hs-cTnT levels in all subjects. Circulating hs-cTnT levels increased in both exercise trials (p < 0.001), with higher peak values occurring after the 1-h trial compared with those of the 6-h trial (p = 0.023). The upper reference limit (URL) exceeded 83 % of the participants in the 1-h trial and 42 % of the participants in the 6-h trial. There was substantial individual variability in peak hs-cTnT in both trials. Values of hs-cTnT were greater after exercise than during exercise for the 6-h trial. For both exercise trials, the maximum postexercise hs-cTnT values correlated with the %HRMAX (r = 0.906 for the 1-h trial, r = 0.735 for the 6-h trial). For the 1-h trial, the maximum postexercise hs-cTnT values were observed at 3 h in all subjects. No significant difference in the hs-cTnT values was observed for the 6-h trial during the first 12 h postexercise. Conclusions: Our results demonstrated greater hs-cTnT levels in young male participants after a 1-h cycling trial than after a 6-h cycling trial, despite a substantially greater energy expenditure and total external work completed in the 6-h trial. Postexercise hs-cTnT values are associated with relative exercise intensity.

Item Type:	Article
Uncontrolled Keywords:	Amateur cyclists; Cardiac biomarkers; Exercise duration; Exercise intensity; 1106 Human Movement and Sports Sciences; 1116 Medical Physiology; 1117 Public Health and Health Services; Sport Sciences
Subjects:	R Medicine > RC Internal medicine > RC1200 Sports Medicine
Divisions:	Sport and Exercise Sciences
Publisher:	Elsevier
SWORD Depositor:	A Symplectic
Date Deposited:	04 Oct 2024 10:30
Last Modified:	04 Oct 2024 10:30
DOI or ID number:	10.1016/j.jsams.2024.08.207
URI:	https://researchonline.ljmu.ac.uk/id/eprint/24401

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