Believe it or not, running shoes wear out. How? Well, over time they lose their shock absorption capacity and stability. As a result, experts recommend that you replace running shoes every 350-550 miles, depending on your running style.

Challenge yourself during the next week to replace your running shoes if they’ve passed their ‘expiration’ date.

(We’ve given you 7 days to find a pair of shoes. When you log your progress, you only need to log as many days as are applicable.)