Incidence of Asymptomatic, Nontraumatic Unilateral Knee Hyperextension in the High School Athlete
Four hundred sixty-seven high school athletes were screened in apreparticipation athletic physical. Forty-six (9.8%) of these athletes presented with asymptomatic, nontraumatic unilateral hyperextension. Twenty-three athletes were reexamined and compared to a normal control group. A 2.5-cm, statistically significant heel-to-heel difference was recorded in the hyperextension group. Between the involved hyperextended and uninvolved legs, there were differences in average range of motion (132.04° vs. 130.74°, respectively), average manual anterior translation by KT-1000 (5.39 mm vs. 5.15 mm, respectively), average posterior translation (2.07 mm vs. 2.00 mm, respectively), average peak quadriceps torque (86.25 ft-lb vs. 84.06 ft-lb, respectively), and hamstring average peak torque (53.89 ft-lb vs. 52.93 ft-lb, respectively), though these differences were not statistically significant. In the control group, there was no heel-to-heel difference in the right versus the left knee. Heel-to-heel difference between the experimental and control groups was statistically significant. There was no statistically significant difference between range of motion, anterior translation, or posterior translation between the experimental and control groups.
Published In/Presented At
Arangio, G.A., St. Amour-Myers, M., Reed, J. (1996). Incidence of Asymptomatic, Nontraumatic Unilateral Knee Hyperextension in the High School Athlete. Journal of Sport Rehabilitation, 5(4), 287-292. doi:http://dx.doi.org/10.1123/jsr.5.4.287
Medicine and Health Sciences | Orthopedics | Other Medical Specialties | Surgery
Department of Community Health and Health Studies, Department of Surgery, Department of Surgery Faculty