The kinetics of cardiac troponin I in saliva following 5-km and 21-km running trials
https://doi.org/10.47529/2223-2524.2025.2.5
Abstract
Objective: to compare changes in salivary concentrations of cardiac troponin I (cTnI) in athletes after 5-km and 21-km running trials.
Materials and methods: 32 male athletes were recruited and assigned to two groups. Participants of group 1 (n = 16) completed a 5-km running trial, while participants of group 2 (n = 16) completed a 21-km running trial. Unstimulated saliva was collected using the spitting method at pre-exercise (T1), post-exercise (T2), 4 hours post-exercise (T3), and 24 hours post-exercise (T4). Salivary concentrations of cTnI were measured using a Getein analyser. Data are expressed as median and interquartile range (Me [IQR]).
Results: Salivary levels of cTnI increased significantly in both running trials, with higher peak values occurring after the 5-km running trial compared with those of the 21-km running trial. cTnI levels in saliva rose at T2 (group 1: 0.38 [0.34–0.41] ng/mL; group 2: 0.33 [0.29–0.35] ng/mL) compared to T1 (group 1: 0.14 [0.13–0.16] ng/mL; group 2: 0.15 [0.13–0.17] ng/mL), peaked at T3 (group 1: 0.59 [0.54–0.64] ng/mL; group 2: 0.40 [0.38–0.44] ng/mL), and returned to baseline by T4 (group 1: 0.17 [0.13–0.20] ng/mL; group 2: 0.13 [0.11–0.17] ng/mL).
Conclusion: A 5-km running trial induced a greater increase in salivary levels of cTnI in athletes compared to a 21-km running trial, indicating a dominant role of exercise intensity in cTnI release.
About the Author
A. N. OvchinnikovRussian Federation
Aleksandr N. Ovchinnikov, Associate Professor, Department of Sports Medicine and Psychology
23 Gagarin Avenue, Nizhny Novgorod, 603022
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Review
For citations:
Ovchinnikov A.N. The kinetics of cardiac troponin I in saliva following 5-km and 21-km running trials. Sports medicine: research and practice. (In Russ.) https://doi.org/10.47529/2223-2524.2025.2.5



























