Often the pain of a stress fracture is mild, occurring during or right after exercising. Continuing to exercise makes it worse, but for the first few weeks, such fractures are usually too small to be detected, even by X-ray. Fortunately, the fractures rarely break through the bone, so they don’t require splints or casts to heal, only rest. To minimize impact, run and jump on soft surfaces. Following are four tips to prevent overuse injuries, whether from tendinitis or stress fractures.