Running shoe materials and designs are getting more advanced, but they’re still man-made products with distinct lifespans. “These new running shoes are just like any other chemical compound under constant pressure,” says Claire Wood, senior product manager for performance running at New Balance.
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“They will break down over time.” Logging miles in worn-out shoes not only slows you down, but it can also increase your risk of injury. Before you shell out money for new kicks though, use these 5 guidelines to find out if yours are ready for retirement or if they have some mileage left in them.