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Walking is one of the best forms of exercise, but if your sneaker isn't comfortable, it can cut your mileage short fast. Miguel Cunha, D.P.M., founder of Gotham Footcare in New York City, suggests trying on three different models before buying, since sizing differs across brands and the length and width of your foot changes over time. He also says you should always, always perform the toe test. "Make sure the tip of your thumb fits between the end of the shoe and the end of your longest toe," he says. Otherwise, look for a walking shoe that provides plenty of shock absorption, arch support, and cushioning, says Jacqueline Sutera, spokesperson for the American Podiatric Medical Association (APMA). These options all fit the bill, so nab a pair and hit the track, treadmill, or sidewalk for a sweaty workout.