Running does not take much equipment. In fact, your shoes are it, so they need to be the best for you and not someone else. According to ePodiatry, the midsole is the most important part of the running shoe. It needs to be made from durable material and support your biomechanics. If you pronate (ankle rolls in), extra material and cushioning on the medial side of the shoe will help. If you supinate, (ankle rolls out), shock absorbency is critical, especially on the outside of the heel. Know everything you can about how you run before you shop for your running shoe. If you mostly run outdoors, the outer sole is just as important as the midsole. It needs traction and durability. Putting in more miles per run affects which shoe you need to buy, so consider the length of your average run.