In the introduction to the performance health series we highlighted injuries as a major factor influencing performance. Injuries limit availability, accumulate over time, impact goal achievement, and are the a leading cause of youth athlete drop outs. As a result, we want to avoid injuries as much as we can, whilst also understanding that, in order to improve, athletes have to undertake training loads and modalities that expose them to an increased risk of injury. This is the balancing act that all coaches face, and in order to do our best we need to start off with an understanding of why athletes get injured in the first place. For that, we can lean on injury models.