期刊
HEART
卷 96, 期 1, 页码 42-48出版社
BMJ PUBLISHING GROUP
DOI: 10.1136/hrt.2009.178426
关键词
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资金
- National Heart, Lung, and Blood Institute [N01-HC-95159, N01-HC-95165, N01-HC-95169]
- DIVISION OF EPIDEMIOLOGY AND CLINICAL APPLICATIONS [N01HC095169, N01HC095159, N01HC095165] Funding Source: NIH RePORTER
- NATIONAL HEART, LUNG, AND BLOOD INSTITUTE [R21HL095165, R44HL095169, R43HL095169] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [ZIAEB000072] Funding Source: NIH RePORTER
- CLINICAL CENTER [ZIACL090019] Funding Source: NIH RePORTER
Objective: To evaluate the association of physical activity with left ventricular structure and function in the general population in a community setting. Design: Cross-sectional study. Setting: The Multi-Ethnic Study of Atherosclerosis (MESA), a population-based study of subclinical atherosclerosis. Participants: A multiethnic sample of 4992 participants (aged 45-84 years; 52% female) free of clinically apparent cardiovascular disease. Interventions: Physical activity induces beneficial physiological cardiac remodelling in a cross-sectional study of non-athlete individuals. Main Outcome Measures: Left ventricular mass, volumes and function were assessed by cardiac magnetic resonance imaging. Physical activity, defined as intentional exercise and total moderate and vigorous physical activity, was assessed by a standard semiquantitative questionnaire. Results: Left ventricular mass and end-diastolic volume were positively associated with physical activity (eg, 1.4 g/m(2) (women) and 3.1 g/m(2) (men) greater left ventricular mass in the highest category of intentional exercise compared with individuals reporting no intentional exercise; p = 0.05 and p < 0.001, respectively). Relationships were non-linear, with stronger positive associations at lower levels of physical activity (test for non-linearity; p = 0.02 and p = 0.03, respectively). Cardiac output and ejection fraction were unchanged with increased physical activity levels. Resting heart rate was lower in women and men with higher physical activity levels (eg, -2.6 beats/minute lower resting heart rate in the highest category of intentional exercise compared with individuals reporting no intentional exercise; p < 0.001). Conclusions: In a community-based population free of clinically apparent cardiovascular disease, higher physical activity levels were associated with proportionally greater left ventricular mass and end-diastolic volume and lower resting heart rate.
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