doi:10.1139/apnm-2015-0055engLegaz-Arrese, A.López-Laval, I.George, K.Puente-Lanzarote, J.Moliner-Urdiales, D.Ayala-Tajuelo, V.Mayolas-Pi, C.Reverter-Masià, J.Individual variability in cardiac biomarker release after 30 min of high-intensity rowing in elite and amateur athletesART-2015-92023This study had two objectives: (i) to examine individual variation in the pattern of cardiac troponin I (cTnI) and N-terminal pro-brain natriuretic peptide (NT-proBNP) release in response to high-intensity rowing exercise, and (ii) to establish whether individual heterogeneity in biomarker appearance was influenced by athletic status (elite vs. amateur). We examined cTnI and NT-proBNP in 18 elite and 14 amateur rowers before and 5 min, 1, 3, 6, 12, and 24 h after a 30-min maximal rowing test. Compared with pre-exercise levels, peak postexercise cTnI (pre: 0.014 ± 0.030 µg·L–1; peak post: 0.058 ± 0.091 µg·L–1; p = 0.000) and NT-proBNP (pre: 15 ± 11 ng·L–1; peak post: 31 ± 19 ng·L–1; p = 0.000) were elevated. Substantial individual heterogeneity in peak and time-course data was noted for cTnI. Peak cTnI exceeded the upper reference limit (URL) in 9 elite and 3 amateur rowers. No rower exceeded the URL for NT-proBNP. Elite rowers had higher baseline (0.019 ± 0.038 vs. 0.008 ± 0.015 µg·L–1; p = 0.003) and peak postexercise cTnI (0.080 ± 0.115 vs. 0.030 ± 0.029 µg·L–1; p = 0.022) than amateur rowers, but the change with exercise was similar between groups. There were no significant differences in baseline and peak postexercise NT-proBNP between groups. In summary, marked individuality in the cTnI response to a short but high-intensity rowing bout was observed. Athletic status did not seem to affect the change in cardiac biomarkers in response to high-intensity exercise.2015http://zaguan.unizar.es/record/16848010.1139/apnm-2015-0055http://zaguan.unizar.es/record/168480oai:zaguan.unizar.es:168480Applied Physiology Nutrition and Metabolism 40, 9 (2015), 951-958All rights reservedhttp://www.europeana.eu/rights/rr-f/info:eu-repo/semantics/openAccess