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- Title
Relationship between cold water swimming and increased cardiac markers: A pilot study.
- Authors
P., Brož; D., Rajdl; J., Racek; V., Zeman; J., Novák; L., Trefil
- Abstract
Aim: Drowning causes about five hundred thousand deaths in the world every year. There is a higher risk of adverse medical events and death from cardiac causes in participants of cold water swimming (CWS). Material and methods: Eight swimmers (five men, three women), with a median age of 40 years (range 31-71), were examined during winter swimming competition in November 2014. Six swimmers (four men, two women) swam 500 m long distance, one woman swam 750 m and one man swam 1000 m long distance. The swimmers' body temperatures were measured immediately after the swim. Concentrations of high sensitivity troponin I (hsTnI), high sensitivity troponin T (hsTnT) and aminoterminal pro-BNP (NT-proBNP) were examined one day before, immediately after, two hours after and 24 hours after the competition. Trends of hsTnI, hsTnT and NT-proBNP were tested using the Analysis of Variance (ANOVA). Results: Swimming times ranged from 9 min and 36 s to 26 min and 48 s depending on distance and velocity. The median body mass index (BMI) of swimmers was 24.8 kg.m-2 (range 22.1-27.9). There was a statistically significant increase of hsTnI two hours after CWS (p=0.048 for quadratic trend). Trends of hsTnT and NT-proBNP did not exhibit statistically significant differences (p=0.19 and p=0.57, respectively). Conclusion: CWS can be connected with release of cardiac troponins. However, it is not connected with release of NTproBNP. Future research should clarify whether release of cardiac troponins during CWS can be connected with presence of arrhythmias, higher cardiovascular risk or probability of incidental heart failure.
- Subjects
PHYSIOLOGICAL effects of swimming; HEART failure risk factors; PHYSIOLOGICAL effects of cold temperatures
- Publication
Klinická Biochemie a Metabolismus, 2017, Vol 25, Issue 1, p27
- ISSN
1210-7921
- Publication type
Article