The supra shoe should fit snuggly but not so tight that you experience discomfort. It's helpful to wait until later in the day to try on running shoes when your feet are their largest due to swelling. Be sure to take along the same type of socks you use while running to wear while trying on running shoes. Buy Your supra Shoes From a Store That Specializes in Running Shoes. The advantage to choosing a woman's running shoe from a specialty store is that you can get expert advice on which supra shoes to select as well as have a chance to test the shoe while in the store. This may not be possible if you go to a discount store. When you test your chosen running shoes, jog around the store until you can determine how the supra shoe feels on your foot. Try on many pairs of shoes before making your final decision. Don't hesitate to ask the people who help you questions. Many of the salespeople in specialty sports shoe stores are quite knowledgeable in the art of choosing women's running shoes.Know When It's Time To Replace Your Old Running Shoes. If you run five days a week, you should aim for replacing your running shoes for women every four to five months.