ABSTRACT
Physical inactivity is more prevalent among women than men, varies by ethnic groups, and becomes increasingly prevalent with age. The aim of this study was to examine the effects of a 12-week exercise program on the cardiovascular disease risk and fitness of Iranian middle aged women. This was a randomized controlled trial study. Participants in the training group [n=20] performed treadmill running exercise at a high intensity [70-80% of maximum heart rate, 0% grade] for 30 min/day, 3 days/week. On the other hand, participants in the control group [n=20] were asked to maintain their habitual lifestyle and not change their activity or dietary habits. Measurements of body mass index, waist/hip ratio, blood pressure, total cholesterol, and lipoprotein subtractions were taken before program and after 12 weeks. Changes in 10-year risk scores for coronary heart disease were calculated using Framingham risk equation. Significant decreases in systolic and diastolic blood pressure, reduction in 10-year risk of coronary heart disease, and reduction in lipid levels were found within the training group between baseline and 12-week measurements. No changes were found in these parameters within the control group. The study provides evidence for the positive effects of exercise training on the reduction of cardiovascular disease risks among women aged 40-55 years