Determining any relationships of hip internal rotation ranges of motion, actively and passively, in healthy 14-25 year old females compared to 14-24 year old females with an anterior cruciate ligament (ACL) injury. The objective is to analyze, with the simple clinical measurement of a hand held goniometer, bilateral hip ranges of motion symmetries in a healthy female basketball players ages 14-24 years of age. Within a case control study, hip internal rotation ranges of motion were measured, both actively and passively, to determine if they were greater in the participants’ injured lower extremity hips, compared to their uninjured lower extremity hips. Hip internal rotation excess (HIRE) may be present in females 14-24 years old with a non-contact anterior cruciate ligament (ACL) injury, as this transverse plane hip movement is associated with dynamic knee valgus which occurs during this type of knee injury.
