Gymnastik- och idrottshögskolan, GIH

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Aerobic capacity predict skeletal but not cardiac muscle damage after triathlon - the Iron(WO)man study.
Linnaeus University, Kalmar, Sweden..
Linnaeus University, Kalmar, Sweden..
Gymnastik- och idrottshögskolan, GIH, Institutionen för idrotts- och hälsovetenskap. Linnaeus University, Kalmar, Sweden..ORCID-id: 0000-0001-6878-3142
Linnaeus University, Kalmar, Sweden..
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2020 (engelsk)Inngår i: Scientific Reports, E-ISSN 2045-2322, Vol. 10, nr 1, artikkel-id 901Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

This study examines the association between aerobic capacity and biomarkers of skeletal- and cardiac muscle damage among amateur triathletes after a full distance Ironman. Men and women (N = 55) were recruited from local sport clubs. One month before an Ironman triathlon, they conducted a 20 m shuttle run test to determine aerobic capacity. Blood samples were taken immediately after finishing the triathlon, and analyzed for cardiac Troponin T (cTnT), Myosin heavy chain-a (MHC-a), N-terminal prohormone of brain natriuretic peptide (NT-proBNP), Creatin Kinas (CK), and Myoglobin. Regression models examining the association between the biomarkers and aerobic capacity expressed in both relative terms (mLO2*kg-1*min-1) and absolute terms (LO2*min-1) controlled for weight were fitted. A total of 39 subjects (26% females) had complete data and were included in the analysis. No association between aerobic capacity and cardiac muscle damage was observed. For myoglobin, adding aerobic capacity (mLO2*kg-1*min-1) increased the adjusted r2 from 0.026 to 0.210 (F: 8.927, p = 0.005) and for CK the adjusted r2 increased from -0.015 to 0.267 (F: 13.778, p = 0.001). In the models where aerobic capacity was entered in absolute terms the adjusted r2 increased from 0.07 to 0.227 (F: 10.386, p = 0.003) for myoglobin and for CK from -0.029 to 0.281 (F: 15.215, p < 0.001). A negative association between aerobic capacity and skeletal muscle damage was seen but despite the well-known cardio-protective health effect of high aerobic fitness, no such association could be observed in this study.

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Nature Publishing Group, 2020. Vol. 10, nr 1, artikkel-id 901
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URN: urn:nbn:se:gih:diva-6011DOI: 10.1038/s41598-020-57842-wISI: 000512142100139PubMedID: 31965015OAI: oai:DiVA.org:gih-6011DiVA, id: diva2:1389178
Tilgjengelig fra: 2020-01-29 Laget: 2020-01-29 Sist oppdatert: 2022-09-15

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