Exercise-induced cardiac troponin T release: a meta-analysis.
Level 3 - non-randomized controlled study
Meta-analysis of observational studies
PubMed 18046180 · doi:10.1249/mss.0b013e318153ff78
What was done
Authors searched PubMed, SportDiscus, Embase (1997–2006), reference lists, and consulted experts to identify studies examining cardiac troponin T (cTnT) release following endurance exercise. A random-effects meta-analysis was conducted across 26 studies (1,120 cases). Meta-regressions evaluated age, gender, body mass, exercise mode, and event duration as potential moderators.
What was found
Postexercise cTnT exceeded the assay detection limit in 47% of participants (95% CI = 39–56%). Detection of postexercise cTnT was roughly half as frequent after cycling compared to running events (27% vs. 52%, P = 0.042). Detection decreased slightly as event duration increased (P = 0.022) and as mean body mass decreased (P = 0.0033). Detection was slightly higher in cohorts with more males (P = 0.028) and was not significantly affected by age (P = 0.309).
Why it matters
This review establishes that elevated cTnT is present in nearly half of endurance athletes post-event, particularly heavier runners in shorter events. This benchmark helps clinicians avoid misinterpreting benign postexercise biomarker release as acute myocardial infarction.
Limits
The abstract pools small observational cohorts without non-exercise control groups. Exact assay generations, detection thresholds, sampling time points, and long-term clinical outcomes were not detailed in the abstract.
Cited by
- supports Intense exercise that elevates heart rate increases circulating markers of cardiac damage that require recovery time.