Sternal fractures often result from a blow to the chest. Often times a blow to the chest comes in contact sports such as football. Another frequent cause is in an auto accident, when an airbag fails to deploy in a head-on collision or an unrestrained driver hits the steering wheel. Sometimes, the seatbelt itself when used can hold someone from flying forward, but can lead to a sternal fracture. If you've been injured by a blow to the chest, how do you know if you have a sternal fracture or if you just bruised the bone and/or muscles or strained something? This article will explore how to identify sternal fractures.