When should you replace your running shoes? A common question asked of us is when should running shoes be replaced? Many runners routinely wear and alternate between two pairs of running shoes, and will replace them based on the mileage they put in. Not all runners are so serious, however, painful conditions such as plantar fasciitis, back pain and even knee pain can occur if the shoes are worn out or if the suspension system in the shoe is irreparably damaged. If you are built asymmetrically, wearing a good foot orthotic can reduce the wear on your current shoes. This is similar to a wheel alignment on a car being out of line and how it affects the tires after many miles. A good off the shelf or custom insole can add miles to your shoes and help your body feel better during most runs. Can you tell if your shoes are due to replacement? Cnet offers some great advice on when to replace your shoes. 5 signs you should replace your running shoes It's not a matter of time, but a matter of miles. BY AMANDA CAPRITTO JULY 31, 2019 Whether you're training for a 5K or an ultramarathon, you'll need a trusty pair of tennis shoes that will take you to the finish. Part of a successful training cycle and pain-free race day is making sure your running shoes aren't too worn out. Studies show that worn-down shoes cause runners to change their posture and gait (their manner of running), which can lead to injuries down the line. This is largely due to a decline in the shoes' shock-absorption abilities. Sometimes it's hard to give up a favorite pair of old shoes, but when they start to hurt more than they help, remember it's for the sake of your health. Read more