This chapter contains sections titled: Epidemiology Functional Anatomy and Biomechanics of the Sporting Ankle History of Acute Injury Other Causes of Anterior Ankle Pain Lateral Ankle Pain Posterior Ankle Pain Medial Ankle Pain Acute Treatment and Rehabilitation of the Lateral Ankle Sprain Ankle Injury Prevention Case Study Appendix – 21-Day Ankle Sprain Rehabilitation Booklet Acute Management References