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THURSDAY, Feb. 21 (HealthDay News) -- A moderate level of aerobic fitness can significantly reduce stroke risk in men and women, according to a large, long-running study.
The study, expected to be presented Thursday at the American Stroke Association's International Stroke Conference in New Orleans, showed 30 minutes or more of brisk walking, or an equivalent aerobic activity, five days a week could lower stroke risk by about 40 percent.
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Fitness has a protective effect regardless of the presence or absence of other stroke risk factors, including family history of cardiovascular disease, diabetes, high blood pressure, elevated cholesterol levels and high body mass index, study author Steven Hooker said in a prepared statement.
This study is the first to suggest there may be a significant independent association between cardiorespiratory fitness (CRF) and fatal and nonfatal stroke in men and nonfatal stroke in women, said Hooker, director of the Prevention Research Center at the University of South Carolina Arnold School of Public Health.
About 780,000 U.S. adults suffer a stroke each year, and stroke is a leading cause of serious, long-term disability in the United States, according to the American Stroke Association. About 150,000 people die from strokes annually, making it the nation's No. 3 cause of death.
Researchers analyzed data on more than 60,000 people -- 46,405 men and 15,282 women -- who participated in a long-term study at the Cooper Aerobics Center in Dallas between 1970 and 2001. The participants, aged 18 to 100 and free of known cardiovascular disease when they entered the study, were followed for an average of 18 years. During that time, 863 people -- 692 men and 171 women -- had strokes.
Upon entering the study, each participant took a test to measure cardiorespiratory fitness in which they walked on a treadmill at an increasing grade and/or speed until they reached their maximal aerobic capacity.
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-- Kevin McKeever
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