The prevalence of radiographic hip abnormalities in elite soccer players.

Background: Hip injuries, both intra- and extra-articular, are becoming a more commonly recognized, diagnosed, and treated injury in athletes of all competitive levels. Our goal is to establish a previously undefined value in this athletic population--the prevalence of radiographic hip abnormalities in elite soccer athletes.

Purpose: To provide a foundation for the future body of literature regarding hip pathologic abnormalities and "at-risk" hips in athletes of all ages and levels of participation.

A randomized controlled trial to prevent noncontact anterior cruciate ligament injury in female collegiate soccer players.

Background: Neuromuscular and proprioceptive training programs can decrease noncontact anterior cruciate ligament injuries; however, they may be difficult to implement within an entire team or the community at large.

Hypothesis: A simple on-field alternative warm-up program can reduce noncontact ACL injuries.

Study Design: Randomized controlled trial (clustered); Level of evidence, 1.

Avoiding allograft length mismatch during anterior cruciate ligament reconstruction: patient height as an indicator of appropriate graft length.

Background: Given the increasing use of allografts in anterior cruciate ligament reconstruction, selection of appropriate-sized grafts may help individual surgeons as well as the efficiency of the overall system for graft distribution.

Hypothesis: Recipient patient height can predict the desired length for the tendinous portion of a patellar bone-tendon-bone allograft in anterior cruciate ligament reconstruction.

Study Design: Cohort study (Prognosis); Level of evidence, 2.

Effectiveness of a neuromuscular and proprioceptive training program in preventing anterior cruciate ligament injuries in female athletes: 2-year follow-up.

Background: Among female athletes it has not been established whether a neuromuscular and proprioceptive sports-specific training program will consistently reduce the incidence of anterior cruciate ligament injuries.

Purpose: To determine whether a neuromuscular and proprioceptive performance program was effective in decreasing the incidence of anterior cruciate ligament injury within a select population of competitive female youth soccer players.

Study Design: Cohort study; Level of evidence, 2.