Articles15 June 2004
A Six-Year Randomized, Controlled Trial
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    Abstract

    Background:

    Although regular physical activity is recommended for prevention of cardiovascular diseases, no data are available on its antiatherosclerotic effects in the general population.

    Objective:

    To determine whether progressive aerobic exercise compared with usual activity slows progression of atherosclerosis in men.

    Design:

    A 6-year randomized, controlled trial.

    Setting:

    Eastern Finland.

    Participants:

    140 middle-aged men randomly selected from the population registry.

    Intervention:

    Low- to moderate-intensity aerobic exercise.

    Measurements:

    Atherosclerosis was quantitated ultrasonographically as the mean intima–media thickness in the carotid artery at baseline and at years 2 through 6.

    Results:

    On the basis of intention-to-treat analyses, a 19.5% net increase (P < 0.001) in ventilatory aerobic threshold was evident in the exercise group after 6 years. High-sensitivity C-reactive protein levels were statistically nonsignificantly lower in the exercise group than in the control group (P > 0.2). The progression of intima–media thickness in the carotid artery did not differ between the study groups (P > 0.2). A subgroup analysis that excluded men taking statins showed that the 6-year progression of intima–media thickness, adjusted for smoking and annual measures of low-density lipoprotein cholesterol level, systolic blood pressure, and waist circumference, was 40% less in the exercise group (0.12 mm [95% CI, −0.010 to 0.26 mm]) than in the control group (0.20 mm [CI, 0.05 to 0.35 mm]).

    Limitations:

    Only middle-aged white men were included. The intervention included mainly aerobic exercises.

    Conclusions:

    Aerobic physical exercise did not attenuate progression of atherosclerosis, except in a subgroup of men not taking statins.

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