Apples to Oranges: Inconsistencies in Defining and Classifying Youth Sport Populations

Affiliations

• ¹ Department of Rehabilitation, Nicklaus Children's Hospital, Miami, Florida.
• ² Department of Health Sciences, Duquesne University, Pittsburgh, Pennsylvania.
• ³ Faculty of Sport Sciences, Waseda University, Tokyo, Japan.
• ⁴ The Micheli Center for Sports Injury Prevention, Waltham, Massachusetts.
• ⁵ Children's National Hospital, Division of Orthopaedic Surgery and Sports Medicine, Washington, District of Columbia.
• ⁶ School of Rehabilitation Sciences, University of Ottawa, Ottawa, ON, Canada; and.
• ⁷ Sports Medicine and Movement Laboratory, School of Kinesiology, Auburn University, Auburn, Alabama.