Serum cardiac troponin T in adolescent runners: Effects of exercise intensity and duration

F. Fu, J. Nie, T. K. Tong

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71 Citations (Scopus)


The purpose of this study was to evaluate the interactive effects of exercise duration and intensity on the elevation of serum cardiac troponin T (cTnT) in trained adolescent athletes following prolonged exercise in a laboratory-based setting. Thirteen male adolescent runners (mean age 14.8 ± 1.6 year) performed two 45-min and two 90-min constant-load treadmill runs with intensities set at the running speeds that corresponded to either 80 % or 100 % ventilatory threshold (Thvent): 80%Thvent45 min, 80%Thvent90 min, 100%Thvent45 min and 100%Th vent90 min. Serum cTnT was assessed pre and post exercise. In the 100%Thvent45 min trial, the post-exercise serum cTnT level [(Median) 0.015; (Range)<] was greater than that of the 80%Thvent45 min (undetectable cTnT) and 80%Th vent 90 min (detectable cTnT in two subjects, 0.021 and 0.133 trials (P<0.01). The serum cTnT level was further increased in the 100%Thvent90 min trial [(Median) 0.063 -1; (Range)<] when the treadmill run was sustained for an additional 45 min (P < 0.05). Similar changes were observed in the cTnT positive rate in subjects. These fi ndings suggest that exercise duration and intensity are essential factors in eliciting cTnT release interactively following an endurance exercise. Nevertheless, exercise intensity compared to duration appears to cause a more pronounced increase in cTnT levels.

Original languageEnglish
Pages (from-to)168-172
Number of pages5
JournalInternational Journal of Sports Medicine
Issue number3
Publication statusPublished - Mar 2009


  • Cardiac marker
  • Exercise
  • Myocardium


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