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J Am Coll Cardiol. 2005 Nov 1;46(9):1761-7. Epub 2005 Oct 10.

Walking and sports participation and mortality from coronary heart disease and stroke.

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Department of Public Health Medicine, Doctoral Program in Social and Environmental Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki, Japan.



We aimed to examine the impact of exercise on mortality from cardiovascular disease (CVD) in Asian populations.


Few data have been available in Asian countries, where job-related physical activity is higher than that in Western countries.


Between 1988 and 1990, 31,023 men and 42,242 women in Japan, ages 40 to 79 years with no history of stroke, coronary heart disease (CHD), or cancer, completed a self-administered questionnaire. Systematic mortality surveillance was performed through 1999, and 1,946 cardiovascular deaths were identified. We chose the second lowest categories of walking and sports participation as the reference to reduce a potential effect of ill health.


Men and women who reported having physical activity in the highest category (i.e., walking > or =1 h/day or doing sports > or =5 h/week) had a 20% to 60% lower age-adjusted risk of mortality from CVD, compared with those in the second lowest physical activity category (i.e., walking 0.5 h/day, or sports participation for 1 to 2 h/week). Adjustment for known risk factors, exclusion of individuals who died within two years of baseline inquiry, or gender-specific analysis did not substantially alter these associations. The multivariate-adjusted hazard ratios (95% confidence interval) for the highest versus the second lowest categories of walking or sports participation were 0.71 (0.54 to 0.94) and 0.80 (0.48 to 1.31), respectively, for ischemic stroke (IS); 0.84 (0.64 to 1.09) and 0.51 (0.32 to 0.82), respectively, for CHD; and 0.84 (0.75 to 0.95) and 0.73 (0.60 to 0.90), respectively, for CVD.


Physical activity through walking and sports participation might reduce the risk of mortality from IS and CHD.

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