Surgeon General Vivek Murthy unveiled a call to action Wednesday, encouraging walking and walkable communities with the Step It Up initiative.

"We are facing an explosion of chronic illnesses," Murthy said. "Seven out of ten deaths can be prevented by lifestyle changes including physical activity such as walking."

Surgeon General Murthy says just 22 minutes a day of brisk walking can help reduce diabetes and heart disease and it's important to make sure that there are safe walkways available all for adults and children, in order to truly address the lack of physical activity.

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