Wear the right shoe for walking workouts. Buy a shoe specifically designed for walking—it should be flexible at the ball of the foot, but not the arch. The heel should be cushioned. Buy in person, not online—from a knowledgeable salesperson at a store oriented toward runners and walkers. Buy a large-enough shoe—the listed size does not matter, but the fit does. Make sure there is at least a thumbnail's width from the end of your longest toe to the end of the shoe. The best time to have shoes fitted is at the end of the day because your foot swells during the day. Buy a new pair once the padding inside starts to lose its cushioning and stability-usually after about 500 miles.

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