Overuse is the first cause of stress fracture. This may be confusing, but overuse could simply mean a change in activity. An increase in exercise, athletics, job duties or even shoewear can bring on a stress fracture. Some patients even report stress fractures after a simple change like going on a vacation where an unusual amount of walking was done.
Other risk factors include certain sports that have a high frequency of repetitive activity. In particular running and jumping sports may cause stress fractures.
Osteoporosis may also place a patient at risk for stress fracture. Weak or soft bones may not be able to handle even the simplest of changes in activity and develop stress fractures.