We have a dominant foot just as we have a dominant hand. This foot will be used more throughout our daily activities and therefore takes more pressure, so it only makes sense that it would tire faster and hurt more than the other. This is especially true for runners. Many people have a difference in their leg lengths which also causes one foot to overcompensate for the other. This can not only result in foot paint, but back, leg and hip pain. Custom orthotics are used to balance this and stabilized the discrepancy, which not only treats that sore foot but the back, hip and leg pain that are resulting from this.