Dip your feet in water and press them firmly down on a surface that will show a wet footprint, such as a piece of cardboard or construction paper.
Evaluate your footprints. If your heel and forefoot are connected by a wide band, you have a normal, or neutral, arch. If the footprint shows practically the whole sole of the foot, you have an overpronated foot. If the band connecting the heel and the forefoot is thin or nonexistent, then you underpronate, or supinate.
Determine which activity you'll be using these shoes for the most: running, aerobics, tennis or some other type of workout.
Visit a store that specializes in athletic shoes instead of a generalized department store with a small shoe selection. A knowledgeable staff is indispensable to finding the proper workout shoe. Tell the salesperson what type of feet you have (neutral, overpronator, or supinator) and what form of athletic activity you'll be doing the most in your shoes.
Try on several pairs of shoes particularly for your foot and your form of athletic activity. Always put on both shoes, lace them up as you normally would and practice a few moves: if you're a runner, run in them; if you're an aerobic exerciser, do some squats; if you jump rope, start bouncing up in down in the store.
Select the shoe that feels the best. Don't be tempted with two-for-one deals with cheaper shoes that don't feel as good.