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The research involved about 1.5 million Swedes who all underwent physical fitness tests when they were conscripted into the military at age 18. Their health outcomes were then tracked up to the age of 62.
Poor aerobic fitness and low muscle strength at age 18 was linked to a tripling of risk for diabetes in adulthood, regardless of the person's body weight, reports a team led by Dr. Casey Crump of the Icahn School of Medicine at Mount Sinai in New York City.
The study was funded by the U.S. National Institutes of Health and published March 7 in the journal Annals of Internal Medicine.
They believe the findings support programs to boost aerobic and muscle fitness in young people. The study also sends an important message to out-of-shape people who don't think they're at risk for diabetes because they are not obese, the researchers said.
Other experts agreed.
"A healthy lifestyle at any age reduces the risk of chronic disease throughout the life cycle," said Dr. Howard Selinger, chair of family medicine at Quinnipaic University's School of Medicine in Hamden, Conn.
Dr. Gerald Bernstein coordinates the Friedman Diabetes Program at Lenox Hill Hospital in New York City. He called the study "important," because it echoes findings from other research showing that "exercise, especially aerobic, improves insulin sensitivity."
"The implication [from this study] is that physical education programs in all levels of early education should be fully implemented prior to age 18 with the hope that progression to prediabetes and diabetes is minimized in later life," he noted.
-- Robert Preidt
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