Changes in Youth Baseball Pitching Biomechanics: A 7-Year Longitudinal Study.

Background: Pitching biomechanics are associated with performance and risk of injury in baseball. Previous studies have identified biomechanical differences between youth and adult pitchers but have not investigated changes within individual young pitchers as they mature.

Hypothesis: Pitching kinematics and kinetics will change significantly during a youth pitcher's career.

Evaluation and Comparison of Femoral Tunnel Placement During Anterior Cruciate Ligament Reconstruction Using 3-Dimensional Computed Tomography: Effect of Notchplasty on Transtibial and Medial Portal Drilling.

Background: Advocates of medial portal drilling claim that the transtibial technique results in a more vertical positioning of the graft, which could lead to subsequent failure and/or a residual pivot shift on postoperative examination. However, advocates of transtibial drilling state that with appropriate placement and adequate notchplasty, their technique places the graft in a more anatomically correct position on the wall, negating the resultant potential for pivot shift and early postoperative failure.

Hypothesis: Transtibial femoral drilling can adequately reproduce the femoral origin of the anterior cruciate ligament (ACL) and place the graft in an anatomical position equivalent to medial portal drilling.

Biomechanical comparison of baseball pitching and long-toss: implications for training and rehabilitation.

Study Design: Controlled laboratory study.

Objectives: To test for kinematic and kinetic differences between baseball pitching from a mound and long-toss on flat ground.

Background: Long-toss throws from flat ground are commonly used by baseball pitchers for rehabilitation, conditioning, and training.

Comparison of standard screw fixation versus suture button fixation in Lisfranc ligament injuries.

Background: The standard operative treatment for Lisfranc injuries is to openly reduce them and use screw fixation. Due to the current trend of applying a more physiologic fixation and decreasing the need for screw removal, a recent interest has developed in suture-button fixation. The purpose of this study was to compare the suture button technique for Lisfranc fracture fixation to the traditional interfragmentary screw fixation.

Passive ranges of motion of the hips and their relationship with pitching biomechanics and ball velocity in professional baseball pitchers.

Background: Pelvis and trunk motions during baseball pitching are associated with ball velocity. Thus, limits in hip flexibility may adversely affect pitching biomechanics and the ability to generate ball velocity.

Hypotheses: Professional baseball pitchers will have less passive range of motion in the nondominant hip and the measured ranges of motion of both the nondominant and dominant hips will correlate with biomechanical parameters of the lower extremity among professional pitchers.