Trimming the rise in obesity in the U.S. by just 1 percent over the next two decades would reduce health care costs by by $85 billion. The fight isn't likely to be cheap. But new researchers shows that even a small dent in obesity rates could pay off.
Endurance athletes sometimes say they're "addicted" to exercise, and research suggests that may not be an overstatement. "Our brains have been sort of rewired from an evolutionary sense to encourage these running and high aerobic-activity behaviors," one researcher says.
Some experts recommend taking 10,000 steps a day for optimal health — a number that can be hard to get to on a busy day. Taking a work meeting to the sidewalk is one way to get more daily exercise. But how much walking do we really need?
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