Soldiers’ Heart: A Prospective Study of Cardiac Remodeling in Soldiers Undergoing Progressive Intensity Exercise Training
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Le résumé fourni par la source
PURPOSE: Most studies reporting cardiac changes with exercise have been cross sectional. The few available longitudinal studies have lacked standardization for environmental confounders. We prospectively assessed the relationship between increasing exercise intensity and cardiac remodeling in a highly standardized cohort of healthy young army soldiers. METHODS: Sixty-three male army recruits (22 ± 3 yr) underwent a 12-wk moderate-intensity mixed strength and endurance exercise program, followed by a further 15-wk high-intensity exercise program, with highly controlled exercise, diet, and sleep patterns. Fitness (multistage fitness test), anthropometry, and 2D echocardiography were assessed. RESULTS: Moderate-intensity exercise was associated with increased fitness and decreased body fat % (both P < 0.01). There was no significant incremental change in these parameters after high-intensity exercise. By contrast, both moderate- and high-intensity exercises were associated with dose-dependent increases in left atrial and left ventricular (LV) volumes, LV mass, and right ventricular (RV) size (all P < 0.01). At the end of high-intensity training, 51% had a dilated LV and 59% had a dilated RV compared with published normal ranges. Almost all had normal LV systolic function and strain before and after exercise training. A small number of soldiers had mildly decreased RV systolic function at baseline and after moderate-intensity exercise (3% and 6%, respectively). CONCLUSIONS: We describe "soldiers' heart," which is characterized by balanced chamber dilatation, normal LV mass, and largely normal systolic function and myocardial strain. This prospective and highly controlled longitudinal study also found that increasing intensity exercise was associated with increasing chamber dimensions, which paralleled an increase in fitness after moderate-intensity exercise. After high-intensity exercise, however, cardiac chamber size continued to increase, but fitness did not increase further.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Soldiers’ Heart: A Prospective Study of Cardiac Remodeling in Soldiers Undergoing Progressive Intensity Exercise Training
- Date Crossref
- 26/07/2022
- Éditeur
- Ovid Technologies (Wolters Kluwer Health)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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The University of Sydney pays non établi dans la noticeUniversité ou école supérieure
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Royal Brisbane and Women's Hospital pays non établi dans la noticeÉtablissement de santé
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The Heart Research Institute pays non établi dans la noticeStructure de recherche
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Royal Prince Alfred Hospital pays non établi dans la noticeÉtablissement de santé
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Wagga Wagga Base Hospital pays non établi dans la noticeÉtablissement de santé
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Baker Heart and Diabetes Institute pays non établi dans la noticeOrganisation à but non lucratif
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Faculty of Medicine and Health pays non établi dans la noticeUniversité ou école supérieure
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Heart Research Institute Sydney pays non établi dans la noticeStructure de recherche
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Baker Heart and Diabetes Research Institute pays non établi dans la noticeStructure de recherche
The University of Sydney, Royal Brisbane and Women's Hospital et The Heart Research Institute, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.