Are you a runner? If so, then you’ve probably heard of a stress fracture. Stress fractures are often called hairline fractures or breaks. They are caused by overuse, are very common amongst runners, and occur most often when a runner increases the level of training or begins a new training regimen. Stress fractures commonly occur in the foot, leg and hip in runners and they usually present with insidious (gradual or subtle) onset of pain that is made worse with running or physical activity. But how do you know if you ...