Document Detail

Changes in serum cardiac troponins following a 21-km run in junior male runners.
MedLine Citation:
PMID:  16998456     Owner:  NLM     Status:  MEDLINE    
AIM: This study was designed to examine the appearance and clearance characteristics of serum cardiac troponin T (cTnT) and I (cTnI) in junior runners after an exhaustive 21-km run. The dependence of the alternations of the cardiac troponins on the runners' training status reflected in training years, running ability and physiological profile at ventilatory threshold (Th(vent)) was also examined. METHODS: Ten trained male adolescents (16.2+/-0.6 years) performed 21-km run and graded treadmill exercise with maximum effort on two different days. cTnT and cTnI immediately before and 2, 4 and 24 hours after exercise were measured in the 21-km trial. The parameters at Thvent including the running speed (Th(vent)-Speed) and VO2 (Th(vent)-VO2) were identified in the graded exercise trial. RESULTS: Serum cTnT and cTnI in 6 of the 10 subjects measured 4 hours after the 21-km run were above the myocardial injury cutoffs of 0.03 and 0.09 ng x mL(-1), respectively, but returned towards pre-exercise levels within 24 hours that were not in the same manner observed in the clinical situation of myocardial infraction. The 6 subjects' training status was generally lower than that of the rest 4. Further, subjects' 4-h serum cTnT and cTnI were negatively related to their training years, Th(vent)-Speed and Th(vent)-VO2, and positively related to their personal best in half- and full-marathon races (r2 = or > 36%, n = 10). CONCLUSIONS: Such findings implied that clinicians based the diagnosis of long-distance run-induced myocardial infraction in novice junior runners upon the transient postexercise elevations of cardiac troponins alone should be with caution.
Y Tian; J Nie; T K Tong; J Cao; Q Gao; J Man; Q Shi; W Liu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of sports medicine and physical fitness     Volume:  46     ISSN:  0022-4707     ISO Abbreviation:  J Sports Med Phys Fitness     Publication Date:  2006 Sep 
Date Detail:
Created Date:  2006-09-25     Completed Date:  2007-05-25     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0376337     Medline TA:  J Sports Med Phys Fitness     Country:  Italy    
Other Details:
Languages:  eng     Pagination:  481-8     Citation Subset:  IM    
China Institute of Sport Science, Beijing, China.
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MeSH Terms
Analysis of Variance
Biological Markers / blood
Exercise Test*
Heart Rate
Myocardial Infarction / blood,  physiopathology
Oxygen Consumption
Physical Education and Training
Physical Endurance
Physical Exertion
Pulmonary Gas Exchange
Time Factors
Troponin I / blood*
Troponin T / blood*
Reg. No./Substance:
0/Biological Markers; 0/Troponin I; 0/Troponin T

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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