There is no perfect running shoe, partly because no two feet are alike, even on the same person. Still, top brands can be comfortable, safe, and effective running mates — if you know what to look for. This video gives you some practical guidelines to help you find shoes that will serve you well in the long run. If in doubt, don’t buy. Shoes should feel just right in the store. Don’t count on improvements after they’re “broken in.” Take your time to buy. Try to shop when business is slow so you won’t feel embarrassed about trying on many pairs of shoes. Buying in haste is a good way to end up with a poorly fitting shoe that can cause injuries.