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This is Scientific American's 60-Second Health. I'm Katherine Harmon. Got a minute?

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People with type 2 diabetes also face an increased risk for heart disease.

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And obesity is a big factor for both conditions.

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So looking out for heart health and weight is especially important.

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Now a preliminary study suggests that regular exercise, even without a change in diet, might be a big help.

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Researchers did MRI body scans on 12 adults with type 2 diabetes.

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The images revealed fat buildups in and around critical organs, including the heart and liver.

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The participants then exercised regularly for between three-and-a-half and six hours a week for six months.

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And did a hiking trip.

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Followed up by another MRI scan.

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Which showed an impressive difference:

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fat around the subjects' hearts decreased by 37 percent.

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Liver and abdominal fat were down, too.

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The findings are in the journal Radiology.

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The study provides visual evidence behind the observations that exercise reduces the risk of heart disease and improves metabolic function in diabetics.

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Even before the patients get the further benefits of a good diet.

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Thanks for the minute, for Scientific American's 60-Second Health. I'm Katherine Harmon.

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