Left Ventricular Function and Cardiac Biomarker Release—The Influence of Exercise Intensity, Duration and Mode: A Systematic Review and Meta-Analysis
Objective We performed a systematic review, meta-analysis and meta-regression of exercise studies that sought to determine the relationship between cardiac troponin (cTn) and left ventricular (LV) function. The second objective was to determine how study-level and exercise factors influenced the var...
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Published in | Sports medicine (Auckland) Vol. 49; no. 8; pp. 1275 - 1289 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Cham
Springer International Publishing
01.08.2019
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Objective
We performed a systematic review, meta-analysis and meta-regression of exercise studies that sought to determine the relationship between cardiac troponin (cTn) and left ventricular (LV) function. The second objective was to determine how study-level and exercise factors influenced the variation in the body of literature.
Data sources
A systematic search of Pubmed Central, Science Direct, SPORTDISCUS and MEDLINE databases.
Eligibility criteria
Original research articles published between 1997 and 2018 involving > 30 mins of continuous exercise, measuring cardiac troponin event rates and either LV ejection fraction (LVEF) or the ratio of the peak early (
E
) to peak late (
A
) filling velocity (
E
/
A
ratio).
Design
Random-effects meta-analyses and meta-regressions with four a priori determined covariates (age, exercise heart rate [HR], duration, mass).
Registration
The systematic search strategy was registered on the PROSPERO database (CRD42018102176).
Results
Pooled cTn event rates were evident in 45.6% of participants (95% confidence interval (CI) 33.6–58.2); however, the overall effect was non-significant (
P
> 0.05). There were significant (
P
< 0.05) reductions in
E
/
A
ratio of − 0.38 (SMD = − 1.2, 95% CI − 1.4 to − 1.0), and LVEF of − 2.02% (SMD = − 0.38, 95% CI − 0.7 to − 0.1) pre- to post-exercise. Increased exercise HR was a significant predictor of troponin release and
E
/
A
ratio. Participant age was negatively associated with cTn release. There was a significant negative association between
E
/
A
ratio with increased rates of cTn release (
P
< 0.05).
Conclusions
High levels of statistical heterogeneity and methodological variability exist in the majority of EICF studies. Our findings show that exercise intensity and age are the most powerful determinants of cTn release. Diastolic function is influenced by exercise HR and cTn release, which implies that exercise bouts at high intensities are enough to elicit cTn release and reduce LV diastolic function. Future EICF studies should (1) utilise specific echocardiographic techniques such as myocardial speckle tracking, (2) ensure participants are euhydrated during post-exercise measurements, and (3) repeat measures in the hours following exercise to assess symptom progression or recovery. It is also recommended to further explore the relationship between aging, training history, and exercise intensity on cTn release and functional changes. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Undefined-3 |
ISSN: | 0112-1642 1179-2035 |
DOI: | 10.1007/s40279-019-01142-5 |