Washington: In a new study, researchers have quantified how many years of life are gained by being physically active at different levels, among all individuals as well as among various groups with different body mass index (BMI).Researchers from Brigham and Women’s Hospital (BWH) collaborated with the National Cancer Institute for the study.“We found that adding low amounts of physical activity to one’s daily routine, such as 75 minutes of brisk walking per week, was associated with increased longevity: a gain of 1.8 years of life expectancy after age 40, compared with doing no such activity,” explained I-Min Lee, MD, associate epidemiologist in the Department of Preventive Medicine at BWH and senior author on this study.“Physical activity above this minimal level was associated with additional gains in longevity. For example, walking briskly for at least 450 minutes a week was associated with a gain of 4.5 years. Further, physical activity was associated with greater longevity among persons in all BMI groups: those normal weight, overweight, and obese,” Lee added.In pooled data from six prospective cohort studies, the researchers examined associations of leisure-time physical activity of a moderate to vigorous intensity with mortality. They analysed data from more than 650,000 subjects and followed subjects for an average of ten years- analysing over 82,000 deaths.
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