From the *Matthew Gfeller Sport-Related Traumatic Brain Injury Research Center, Department of Exercise and Sport Science; †Curriculum in Human Movement Science, Department of Allied Health Sciences, School of Medicine; and ‡Department of Epidemiology, The University of North Carolina, Chapel Hill, North Carolina; §Simbex, Lebanon, New Hampshire; ¶Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire; ‖Neuromuscular Research Laboratory, Department of Exercise and Sport Science, The University of North Carolina, Chapel Hill, North Carolina; and Departments of **Neurosurgery; and ††Sport Medicine, Emerson Hospital, Concord, Massachusetts.
Submitted for publication February 2, 2011; accepted July 6, 2011.
Supported by the Ontario Neurotrauma Foundation (Toronto, Ontario, Canada), the USA Hockey Foundation (Colorado Springs, Colorado), and the National Operating Committee on Standards for Athletic Equipment (Overland Park, Kansas).
Dr Greenwald has a financial interest in the HIT System technology used to collect data for this study.
The authors report no conflicts of interest.
Corresponding Author: Jason P. Mihalik, PhD, CAT(C), ATC, The University of North Carolina at Chapel Hill, 313 Woollen Gymnasium, Campus Box 8605, Chapel Hill, NC 27599-8605 ([email protected]).
