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062 The association between ACL injury and restricted hip range of motion among athletes

Background Anterior cruciate ligament (ACL) rupture is the most common knee ligament injury worldwide, and is considered as a public health problem because of its high incidence. Recently, the scientific literature has shown a trend in the study of post-injury treatments and the possible risk factors associated with the causes of these injuries to facilitate the understanding of the mechanisms of this injury and assist in the elaboration of preventive measures, especially for athletes or practitioners of physical activities. Objective To compare the hip range of motion (ROM) measurements of athletes depending on the presence of ipsilateral anterior cruciate ligament injury. Design Case-control study. Setting Athletes diagnosed with previous ACL injury were selected for the case group, and those with other injuries were selected for the control group. Interventions (or assessment of risk factors) Relevant data including participant history, age, gender, and type of sport practiced were collected. the same examiner measured the hip ROM of all participants using a goniometer and a radiographic analysis. Radiographs taken from the anteroposterior view were used to measure the Wiberg angle and from the Dunn view to measure the Alpha angle. Results A total of 77 participants were included: 47 athletes with ACL injuries and 30 with other musculoskeletal injuries. The mean age was 24.7 years, and 46.7% were female. No between-group differences were found with regard to the baseline characteristics. Most of the athletes played futsal (50.6%) followed by soccer (29.8%). The cases presented with significant reductions in hip internal rotation (IR; 24.1° versus32.50°, p<0.0005) and the internal rotation associated with external rotation (IR + ER; 69.9°versus78.5°, p=0.005) ROMs as well as a significant increase in the w radiographic angle (38.7° versus 32.4°, p<0.0005). Conclusions ROM measurements of hip IR, IR + ER, IR values less than 30°, and the w radiographic angle might be associated with previous ipsilateral ACL injuries among athletes.