Module 1: Bone Stress Injuries in Athletes

Bone stress injuries in athletes are introduced through a practical, clinical framework that combines physiology, risk analysis, diagnosis, and return-to-sport planning. Learners are guided through how healthy bone normally adapts to loading through remodeling, including the roles of microdamage, recovery time, and bone strengthening under repeated stress. A central focus is the difference between abnormal load on normal bone and normal or abnormal load on weakened bone. The explanation then follows the progression from normal bone strain to stress response, stress reaction, and eventually stress fracture when remodeling can no longer keep pace with damage. Key concepts such as bone edema, incomplete and complete fractures, and Wolff’s Law are also covered. The module also identifies who is most at risk. It highlights higher rates in female athletes, common injury timing in preseason or early season, and greater prevalence in sports such as cross country, gymnastics, and track. Common injury sites, recurrence risk, and sport-specific patterns are introduced, along with the importance of assessing underlying causes such as low energy availability and relative energy deficiency in sport.