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MRI-derived Right Ventricular Adaptations to Endurance versus Resistance Training.
MedLine Citation:
PMID:  23073215     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
PURPOSE: While left ventricular (LV) adaptation to exercise training has been the focus of 'athlete's heart' research to-date, information regarding right ventricular (RV) adaptation is sparse, due to its complex structure and imaging technique limitations. This is the first prospective, longitudinal randomized study exploring the impact of endurance (E) versus resistance (R) exercise training on RV morphology using MRI. METHODS: Twenty-three young untrained males completed a randomly assigned E (n=10) or R training protocol (n=13) over 6-months that was progressive, supervised and intensive. Repeated measures included body composition, aerobic fitness, muscular strength, RV morphology (MRI) and function (speckle tracking echocardiography). RESULTS: Total lean mass increased in both groups (E: +1.3 kg; 95%CI: 0.3,2.3; R: +2.1 kg; 95%CI: 1.5,3.2) while aerobic fitness significantly improved in E (+3.7 mL.kg-1.min-1; 95%CI: 0.9,6.5) but not in R training. Strength improved in both groups, but to a greater extent in R-trained subjects (+53.8 kg; 95%CI: 46.7,60.9 vs. +35.3 kg; 95%CI: 27.3,43.4). After training, RV mass increased by 2.7g (95%CI: -0.4,5.8) following E and by 1.4 g (95%CI: -1.3,4.1) following R training. RV end-diastolic volume increased after E (+13.8 mL; 95%CI: 1.9,25.7) with a smaller change after R exercise (+3.9 mL; 95%CI: -6.5,14.3). The LV-to-RV mass ratio and myocardial function did not change in either group. CONCLUSIONS: Mild morphological RV adaptation occurred following 6-months of intense supervised E and R exercise training. The degree of change was slightly but not significantly larger after E training. RV changes mirrored those observed in the LV.
Authors:
Angela L Spence; Howard H Carter; Conor P Murray; David Oxborough; Louise H Naylor; Keith P George; Daniel J Green
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-15
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  -     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
1School of Sport Science, Exercise & Health, The University of Western Australia, Crawley, Western Australia 6009 2Envision Medical Imaging, Perth, Western Australia, 6000 3School of Health Care, University of Leeds, Leeds LS2 9JT, United Kingdom 4Research Institute for Sport and Exercise Sciences, Liverpool John Moore's University, Liverpool L3 2ET, United Kingdom.
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