Kinematics and Kinetics of Elite Windmill Softball Pitching
- 1 April 2006
- journal article
- research article
- Published by SAGE Publications in The American Journal of Sports Medicine
- Vol. 34 (4), 597-603
- https://doi.org/10.1177/0363546505281796
Abstract
Background A significant number of time-loss injuries to the upper extremity in elite windmill softball pitchers has been documented. The number of outings and pitches thrown in 1 week for a softball pitcher is typically far in excess of those seen in baseball pitchers. Shoulder stress in professional baseball pitching has been reported to be high and has been linked to pitching injuries. Shoulder distraction has not been studied in an elite softball pitching population. Hypothesis The stresses on the throwing shoulder of elite windmill pitchers are similar to those found for professional baseball pitchers. Study Design Descriptive laboratory study. Methods Three-dimensional, high-speed (120 Hz) video data were collected on rise balls from 24 elite softball pitchers during the 1996 Olympic Games. Kinematic parameters related to pitching mechanics and resultant kinetics on the throwing shoulder were calculated. Multiple linear regression analysis was used to relate shoulder stress and pitching mechanics. Results Shoulder distraction stress averaged 80% of body weight for the Olympic pitchers. Sixty-nine percent of the variability in shoulder distraction can be explained by a combination of 7 parameters related to pitching mechanics. Conclusion Excessive distraction stress at the throwing shoulder is similar to that found in baseball pitchers, which suggests that windmill softball pitchers are at risk for overuse injuries. Normative information regarding upper extremity kinematics and kinetics for elite softball pitchers has been established.Keywords
This publication has 9 references indexed in Scilit:
- Biomechanics of Youth Windmill Softball PitchingThe American Journal of Sports Medicine, 2005
- Humeral Torque in Professional Baseball PitchersThe American Journal of Sports Medicine, 2004
- Relationship between throwing mechanics and elbow valgus in professional baseball pitchersJournal of Shoulder and Elbow Surgery, 2002
- Relationships between Throwing Mechanics and Shoulder Distraction in Professional Baseball PitchersThe American Journal of Sports Medicine, 2001
- Biomechanics of Windmill Softball Pitching With Implications About Injury Mechanisms at the Shoulder and ElbowJournal of Orthopaedic & Sports Physical Therapy, 1998
- Kinetics of Baseball Pitching with Implications About Injury MechanismsThe American Journal of Sports Medicine, 1995
- Injuries to pitchers in women's collegiate fast-pitch softballThe American Journal of Sports Medicine, 1992
- Dynamics of the Shoulder and Elbow Joints of the Throwing Arm during a Baseball PitchInternational Journal of Sport Biomechanics, 1986
- Glenoid labrum tears related to the long head of the bicepsThe American Journal of Sports Medicine, 1985