Not everyone wants to run, Williams agreed. And moderate exercise, such as slower walking, is still beneficial, he said.
"The exercise you do is better than the exercise you don't do," Williams said. "We show weight loss benefit with walking; the benefits just aren't as great as with running."
But walking is just as good as running for reducing heart disease risk factors, including high cholesterol, blood pressure and blood sugar levels, according to a different study that analyzed the same walkers' and runners' data. That study was published online April 4 in the journal Arteriosclerosis, Thrombosis and Vascular Biology.
For information on out-running middle-aged weight gain, see the Lawrence Berkeley National Laboratory.
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