*ATI Physical Therapy, Greenville, South Carolina;
†Center for Effectiveness Research in Orthopedics, SmartState Centers, University of South Carolina, Greenville, South Carolina;
‡Steadman-Hawkins Clinic of the Carolinas, Greenville Hospital System, Greenville, South Carolina;
§Greenville County School System, Greenville, South Carolina; and
¶Exercise and Sport Science, University of North Carolina, Chapel Hill, North Carolina.
Corresponding Author: Ellen Shanley, PT, PhD, OCS, Center for Effectiveness Research in Orthopedics, University of South Carolina, 200 Patewood Rd Suite 100, Greenville, SC 29615 ([email protected]).
J. K. Register-Mihalik has current research funding to her institution from the National Football League for work unrelated to this submitted manuscript and is a current member of USA Football's Football Development Council, where her involvement began after the current study was complete. The remaining authors report no conflicts of interest.
The Athletic Directors, Athletic Trainers, Athletes, and Parents associated with Greenville County School System (Greenville, SC).