A stress fracture is a very small fracture in a bone, and is sometimes referred to as a "hairline fracture". With over two-hundred bones in your body, a fracture can occur nearly anywhere but stress fractures are most prevalent in the foot. This is because the feet bear the weight of the entire body. Often times, stress fractures are related to "overuse", usually resulting from sports, overtraining, or sudden increases in activity without proper conditioning. Athletes playing football, soccer, baseball or any intense sport can develop a stress fracture. The principle of repeatedly hitting or stomping your foot on the same general spot will increase your chances of developing a stress fracture.