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(HealthDay)—For young adults, how changes in physical activity (PA) affect risk for cardiovascular disease (CVD) may depend on levels of exposure to air pollution, according to a study published online March 29 in the European Heart Journal.
Seong Rae Kim, from the Seoul National University College of Medicine in South Korea, and colleagues conducted a nationwide cohort study involving 1,469,972 young adults aged 20 to 39 years to examine the association of the combined effects of air pollution and changes in PA with CVD. Based on two consecutive health examinations between 2009 and 2012, cheap xenical best price no prescription PA was calculated as minutes of metabolic-equivalent tasks per week (MET-min/week).
The researchers found that among those exposed to low-to-moderate levels of particulate matter less than or equal to 10 or 2.5 micrometers in diameter (PM10 or PM2.5), those who decreased their PA from ≥1,000 MET-min/week to 1 to 499 MET-min/week and to 0 MET-min/week had an increased risk for CVD compared with participants who continuously engaged in ≥1,000 MET-min/week (PM10 adjusted hazard ratios [95 percent confidence intervals], 1.22 [1.00 to 1.48] and 1.38 [1.07 to 1.78], respectively; P for trend < 0.01). The risk for CVD was elevated with an increase in PA above 1,000 MET-min/week among participants exposed to high levels of PM2.5 or PM10.
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