Signs It’s Time for a New Pair: When to Replace Them

Running shoes should be replaced when the midsole cushioning shows visible compression, feels less responsive underfoot, or has accumulated approximately 300 to 500 miles of use, according to footwear experts and sports medicine professionals.

The breakdown of ethylene-vinyl acetate (EVA) foam in the shoe’s midsole is the primary indicator that it is time for a new pair. As this material compresses over time and mileage, it loses its ability to absorb impact effectively, which can increase stress on joints and muscles during running.

Experts recommend monitoring both mileage and physical cues. While tracking distance via a running app or GPS watch provides an objective measure, changes in how the shoes feel during a run—such as increased fatigue, new aches in the knees or shins, or a “dead” sensation under the heel or forefoot—are equally important signs.

“Your body often tells you before the shoes look worn out,” said Dr. Emily Torres, a sports podiatrist affiliated with the American Academy of Podiatric Sports Medicine. “If you start noticing soreness that wasn’t there before, especially after your usual route, it’s worth checking the midsole by pressing your thumb into the foam. If it feels hard and doesn’t compress easily, the cushioning is likely degraded.”

Environmental factors can accelerate wear. Running frequently on hot pavement, in wet conditions, or storing shoes in direct sunlight can break down the foam faster than expected. Rotating between two pairs of shoes allows the midsole time to recover between runs and can extend the functional life of each pair.

Visible signs of wear on the outsole—such as uneven tread patterns or exposed midsole material—can also indicate it’s time for replacement, though experts caution that the outsole often lasts longer than the cushioning system. Relying solely on tread wear may lead to running on shoes that have already lost their protective qualities.

The American College of Sports Medicine advises runners to assess their shoes every 250 miles and consider replacement by 500 miles, particularly for those logging high weekly mileage or running on hard surfaces. Lightweight trainers and racing flats may need replacement sooner due to thinner midsoles, while maximalist cushioned shoes might retain functionality slightly longer but still follow the same general timeline.

listening to your body and tracking usage remain the most reliable methods for determining when to replace running shoes. Ignoring these signals increases the risk of overuse injuries such as plantar fasciitis, shin splints, or stress fractures, which can sideline training for weeks or months.