This is potentially the most important part of the shoe because there are very few styles out there that have the kind of arch support your body needs. Again, there are many types of orthotics on the market, so you have to choose. Remember, you have three arches: an inner arch, an outer arch and an arch across the bottom of your forefoot (balls of the foot).
I always recommend custom-made, flexible (not hard plastic), three-arch supportive orthotics. That way, I know my patients are getting adequate support while allowing their feet to move normally as they are walking and running. Your doctor can evaluate whether you need orthotics and which type of athletic shoe is right for you.
Running can be an excellent way to get exercise and it is my hope that you will take what you have read and see how it may help you walk or run more safely. Now lace up those running shoes and have fun!