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Study: More exercise, less sitting reduces heart failure risk for men More exercise, less sitting reduces heart failure risk for men By American Heart Association DALLAS - sitting for long period's increases heart failure risk in men, even for those who exercise regularly, according to new research published in the American Heart Association journal Circulation: Heart Failure. Preventing heart failure, researchers found, requires a two-part behavioral approach: high levels of physical activity plus low levels of sedentary time. The study is the first to examine the link between heart failure risk and sedentary time, said Deborah Rohm Young, Ph.D., lead researcher and a senior scientist at Kaiser Permanente in Pasadena, Calif. "Be more active and sit less. That's the message here," Young said. Researchers followed a racially diverse group of 84,170 men ages 45 to 69 without heart failure. Exercise levels were calculated in METs, or metabolic equivalent of task, a measure of the body's energy use. Sedentary levels were measured in hours. After an average of nearly eight years of follow-up, researchers found: Men with low levels of physical activity were 52 percent more likely to develop heart failure than men with high physical activity levels, even after adjusting for differences in sedentary time. Outside of work, men who spent five or more hours a day sitting were 34 percent more likely to develop heart failure than men who spent no more than two hours a day sitting, regardless of how much they exercised. Heart failure risk more than doubled in men who sat for at least five hours a day and got little exercise compared to men who were very physically active and sat for two hours or less a day. Study limitations included: Since