ACL injuries are a growing problem

AS THE COVID-19 pandemic abates and athletes everywhere prepare to return to the arena, new light is being shed on a serious risk they face. The anterior cruciate ligament (ACL) is one of four that hold the knee together. Tearing it, as at least 2m people do every year, is among the most immobilising injuries someone can sustain. ACL tears are usually a consequence of an awkward movement in a fast-paced game such as football. The surgery and rehabilitation needed cost billions of dollars a year. It is becoming increasingly clear just how devastating—and possibly preventable—this injury really is.