Breaking in your new running shoes will take some time so you might want to consider buying new shoes before your old ones fall apart. Nothing is worse that not having your old running shoes to fall back on while you break in the new ones. Breaking in those new running shoes means wearing them for short periods of time each day until you have them stretched and molded to your feet. If you're uncertain about what sneakers or running shoes you need be sure to ask someone at the store who can help you. The more informed you are the better when it comes to buying new shoes for your feet.