Tibiofemoral alignment: contributing factors to noncontact anterior cruciate ligament injury.

Background: The mechanisms of noncontact anterior cruciate ligament injury remain undefined. The purpose of this study was to identify the tibiofemoral alignment in the lateral compartment of the knee for three variations of a one-limb landing in noncontact sports activities: the safe, provocative, and exaggerated provocative positions. These positions were chosen on the basis of a previous study that measured the average joint angles of the limb at the point of ground contact for athletes who landed without injury (safe) and those who sustained an anterior cruciate ligament injury (provocative).

Video analysis of anterior cruciate ligament injury: abnormalities in hip and ankle kinematics.

Background: Most anterior cruciate ligament research is limited to variables at the knee joint and is performed in the laboratory setting, often with subjects postinjury. There is a paucity of information on the position of the hip and ankle during noncontact anterior cruciate ligament injury.

Hypothesis: When landing after maneuvers, athletes with anterior cruciate ligament injury (subjects) show a more flatfooted profile and more hip flexion than uninjured athletes (controls).

Spinal injuries in sports.

Athletic competition has long been a known source of spinal injuries. Approximately 8.7% of all new cases of spinal cord injuries in the United States are related to sports activities.

Spinal injuries in sports.

Athletic competition has long been a known source of spinal injuries. Approximately 8.7% of all new cases of spinal cord injuries in the United States are related to sports activities.

Catastrophic spine injuries in sports.

Catastrophic spine injuries in sports are rare but tragic events. The sports with the highest risk of catastrophic spinal injuries are football, ice hockey, wrestling, diving, skiing and snowboarding, rugby, cheerleading, and baseball. A common mechanism of injury for all at-risk sports is an axial compression force to the top of the head with the neck slightly flexed.

Catastrophic injuries in high school and college baseball players.

Background: There are few epidemiologic studies of catastrophic baseball injuries.

Purpose: To develop a profile of catastrophic injuries in baseball players and to describe relevant risk factors.

Study Design: Retrospective cohort study.