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Myocardial Adaptations to Recreational Marathon Training Among Middle-Aged Men

Myocardial Adaptations to Recreational Marathon Training Among Middle-Aged Men Ventricular Structure and Function Myocardial Adaptations to Recreational Marathon Training Among Middle-Aged Men Jodi L. Zilinski, MD; Miranda E. Contursi, MS; Stephanie K. Isaacs, BS; James R. Deluca, BS; Gregory D. Lewis, MD; Rory B. Weiner, MD; Adolph M. Hutter, Jr, MD; Pierre A. d’Hemecourt, MD; Christopher Troyanos, ATC; K. Sophia Dyer, MD; Aaron L. Baggish, MD Background—Myocardial adaptations to exercise have been well documented among competitive athletes. To what degree cardiac remodeling occurs among recreational exercisers is unknown. We sought to evaluate the effect of recreational marathon training on myocardial structure and function comprehensively. Methods and Results—Male runners (n=45; age, 48±7 years; 64% with ≥1 cardiovascular risk factor) participated in a structured marathon-training program. Echocardiography, cardiopulmonary exercise testing, and laboratory evaluation were performed pre and post training to quantify changes in myocardial structure and function, cardiorespiratory fitness, and traditional cardiac risk parameters. Completion of an 18-week running program (25±9 miles/wk) led to increased cardiorespiratory fitness (peak oxygen consumption, 44.6±5.2 versus 46.3±5.4 mL/kg per minute; P<0.001). In this setting, there was a significant structural cardiac remodeling characterized by dilation of the left ventricle (end-diastolic volume, 156±26 versus 172±28 mL, P<0.001), right ventricle (end-diastolic area=27.0±4.8 versus 28.6±4.3 cm ; P=0.02), http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Circulation: Cardiovascular Imaging Wolters Kluwer Health

Myocardial Adaptations to Recreational Marathon Training Among Middle-Aged Men

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Copyright
© 2015 American Heart Association, Inc.
ISSN
1941-9651
eISSN
1942-0080
DOI
10.1161/CIRCIMAGING.114.002487
pmid
25673646
Publisher site
See Article on Publisher Site

Abstract

Ventricular Structure and Function Myocardial Adaptations to Recreational Marathon Training Among Middle-Aged Men Jodi L. Zilinski, MD; Miranda E. Contursi, MS; Stephanie K. Isaacs, BS; James R. Deluca, BS; Gregory D. Lewis, MD; Rory B. Weiner, MD; Adolph M. Hutter, Jr, MD; Pierre A. d’Hemecourt, MD; Christopher Troyanos, ATC; K. Sophia Dyer, MD; Aaron L. Baggish, MD Background—Myocardial adaptations to exercise have been well documented among competitive athletes. To what degree cardiac remodeling occurs among recreational exercisers is unknown. We sought to evaluate the effect of recreational marathon training on myocardial structure and function comprehensively. Methods and Results—Male runners (n=45; age, 48±7 years; 64% with ≥1 cardiovascular risk factor) participated in a structured marathon-training program. Echocardiography, cardiopulmonary exercise testing, and laboratory evaluation were performed pre and post training to quantify changes in myocardial structure and function, cardiorespiratory fitness, and traditional cardiac risk parameters. Completion of an 18-week running program (25±9 miles/wk) led to increased cardiorespiratory fitness (peak oxygen consumption, 44.6±5.2 versus 46.3±5.4 mL/kg per minute; P<0.001). In this setting, there was a significant structural cardiac remodeling characterized by dilation of the left ventricle (end-diastolic volume, 156±26 versus 172±28 mL, P<0.001), right ventricle (end-diastolic area=27.0±4.8 versus 28.6±4.3 cm ; P=0.02),

Journal

Circulation: Cardiovascular Imaging – Wolters Kluwer Health

Published: Feb 1, 2015

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