RT Journal Article SR Electronic T1 American Medical Society for Sports Medicine position statement on concussion in sport JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 213 OP 225 DO 10.1136/bjsports-2018-100338 VO 53 IS 4 A1 Kimberly G Harmon A1 James R Clugston A1 Katherine Dec A1 Brian Hainline A1 Stanley Herring A1 Shawn F Kane A1 Anthony P Kontos A1 John J Leddy A1 Michael McCrea A1 Sourav K Poddar A1 Margot Putukian A1 Julie C Wilson A1 William O Roberts YR 2019 UL http://bjsm.bmj.com/content/53/4/213.abstract AB Sport-related concussion (SRC) is a common injury in recreational and organised sport. Over the past 30 years, there has been significant progress in our scientific understanding of SRC, which in turn has driven the development of clinical guidelines for diagnosis, assessment and management of SRC. In addition to a growing need for knowledgeable healthcare professionals to provide evidence-based care for athletes with SRC, media attention and legislation have created awareness and, in some cases, fear about many issues and unknowns surrounding SRC. The American Medical Society for Sports Medicine (AMSSM) formed a writing group to review the existing literature on SRC, update its previous position statement, and to address current evidence and knowledge gaps regarding SRC. The absence of definitive outcomes-based data is challenging and requires relying on the best available evidence integrated with clinical experience and patient values. This statement reviews the definition, pathophysiology and epidemiology of SRC, the diagnosis and management of both acute and persistent concussion symptoms, the short-term and long-term risks of SRC and repetitive head impact exposure, SRC prevention strategies, and potential future directions for SRC research. The AMSSM is committed to best clinical practices, evidence-based research and educational initiatives that positively impact the health and safety of athletes.