Stodden DF, Fleisig GS, McLean SP, Lyman SL, Andrews JR. Relationship of pelvis and upper torso kinematics to pitched baseball velocity. Journal of Applied Biomechanics 17(2):164-172, 2001.

Matsuo T, Escamilla RF, Fleisig GS, Barrentine SW, Andrews JF. Comparison of kinematic and temporal parameters between different pitch velocity groups. Journal of Applied Biomechanics 17(1): 1-13, 2001.

Stodden, DF, Fleisig, GS, McLean, SP, Andrews, JR. Relationship of Biomechanical Factors to Basebal Pitching Velocity: Within Pitcher Variation. Journal of Applied Biomechanics 21(1): 44-56, 2005

Methods

In three published studies, Dr. Glenn Fleisig and Dr. James R. Andrews from ASMI worked with other researchers in studying many of the parameters that affect baseball pitch velocity. Two of the studies looked between different pitchers and one study looked at variations within each pitcher. Motions during delivery were analyzed using a high speed (200 frames per second) infrared three-dimensional motion analysis system.

Results

In the study by Matsuo and others, pitchers with higher ball velocity were compared with pitchers with lower ball velocity. Four significant differences were found between these two groups. Compared to the low ball velocity group, the higher ball velocity pitchers demonstrated less lead knee flexion velocity after front foot contact and greater lead knee extension velocity at the time of ball release. Extending the lead knee in this manner may provide stabilization allowing better energy transfer from the trunk to the throwing arm, and could be a critical factor in pitch velocity. Maximum shoulder external rotation and forward trunk tilt at ball release were also greater in the higher velocity group. Greater shoulder external rotation causes a stretch of the internal rotators allowing energy to be stored in these muscles, and creating greater internal rotation during the arm acceleration phase.

Two variations were found in the timing of events. Maximum elbow extension angular velocity and maximum shoulder internal rotation angular velocity occurred earlier in the motion of higher velocity pitchers. The maximum shoulder internal rotation angular velocity also occurred closer to the moment of ball release in the higher velocity pitchers. This optimal timing may aid in generating higher velocity pitches.

Another finding of interest is that early in the pitching motion, the two groups were dissimilar in the timing of their movements, while their later movement timing was much more similar. This implies that early trunk and torso movements are more varied among pitchers than late arm movements.

In the first study by Stodden and others (2001), pelvis and upper torso variables were studied in 19 elite baseball pitchers. The study found that when the arm was completely cocked back (that is, maximum shoulder external rotation, or “MER”), more “open” pelvis and upper torso orientation correlated with increased ball velocity. More open pelvis angle at the time of ball release (REL) also correlated with increased pitch velocity increased. Additionally, pelvis angular velocity from front foot contact to MER, and upper torso angular velocity from MER to REL increased with increased velocity.

The data indicate that a pitcher who is able to position himself properly, and rotate his pelvis and upper torso more quickly is able to generate greater momentum. Theoretically, this increase in momentum leads to greater velocity of the throwing arm and thus greater pitch velocity.

The most recent study by Stodden and others (2005) showed that for a given pitcher, increased elbow flexion torque, shoulder proximal force and elbow proximal force produced greater ball velocity. In addition, the maximum shoulder horizontal adduction occurred later and maximum shoulder internal rotation occurred earlier at greater ball velocities. Higher ball velocity also resulted in decreased shoulder horizontal adduction at foot contact, decreased shoulder abduction during acceleration, and increased trunk tilt forward at ball release.

Conclusion

A pitcher with increased shoulder external rotation, faster pelvis and upper trunk rotation, and greater front knee stabilization and extension will throw with greater ball velocity. Improved timing to maximize arm velocity closer to the time of ball release will also help ball velocity. Increased torque and force produced at both the shoulder and elbow will also lead to greater ball velocity.

Copyright © 2000, American Sports Medicine Institute
December 18, 2007

http://www.asmi.org/asmiweb/research/usedarticles/highlowpitches.htm

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The Baton Rouge, LA resident has won 12 national Coach of the Year honors from USA Weightlifting. He has coached 43 national champion lifters who set numerous American and junior American records. Among his best-known athletes are 1984 USA Olympian Tommy Calandro and 1988 and 1992 USA Olympian Bret Brian. He has had athletes named to more than 50 USA teams competing internationally. Hatch also has helped shape the careers of several notable strength coaches in the college and professional sports ranks. LSU’s head strength coach, Tommy Moffitt, and Tennessee’s head strength coach, Johnny Long, both attribute their recent national football championships in part to the Hatch strength program. Hatch was a dynamic basketball player for Northwestern State in 1960-62 who was drafted to play professionally. While at Northwestern, Hatch led the Demons in scoring, rebounding and field goal percentage before he was chosen by the Chicago Majors of the American Basketball League, forerunner of the American Basketball Association which eventually merged with the NBA. Hatch set a school record in his senior year by shooting 57.7 percent in 1961-62, a mark that ranks 10th in school history some 40 years later. Hatch established a school mark for scoring with 18 field goals made in a game against a 21-4 Kentucky Wesleyan team, missing only three shots in an amazing performance. He was elected to the American Indian Athletic Hall of Fame in 2003. He is in six Halls of Fame, also included in the Catholic HS, Northwestern State athletic, Northwestern State alumni halls, and material on him was included in the Smithsonian Institute’s National Museum of the American Indian when it opened in 2005.

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Dr. Andrews is Mr. Fixit when it comes to the elite athlete. He has poineered the sports medicine industry. He has worked on the likes of Michael Jordan, Jack Nicklaus, Drew Brees, Roger Clemens, Bo Jackson, and pretty much any other famous athlete you can think of who has been injured. This page is an honor to his amazing impact on sports medicine and a reference to what he has to offer the athlete today. Read his BIO to learn more about him and watch the videos to pick up some helpful tips.

James R. Andrews, M.D. BIO

Doctor James R. Andrews, orthopaedic surgeon, was one of the founding members of the Alabama Sports Medicine and Orthopaedic Center. After the dissolution of Alabama Sports Medicine & Orthopaedic Center he founded the Andrews Sports Medicine and Orthopaedic Center in August 2007. Dr. Andrews was also one of the founders of American Sports Medicine Institute (ASMI) a non-profit institute dedicated to injury prevention, education and research for sports related problems. The foundation continues to be one of the world’s leaders in this field. Dr. Andrews continues to serve as Chairman and Medical Director of ASMI.

Doctor Andrews is also a founding partner and Medical Director of the Andrews Institute located in Gulf Breeze, Florida.

Doctor Andrews is internationally known and recognized throughout the world for his scientific and clinic research contributions in knee, shoulder and elbow injuries, and his skill as an orthopaedic surgeon.

Doctor Andrews came to Birmingham in 1986 to help form the Alabama Sports Medicine and Orthopaedic Center. He has been the mentor for more than 200 orthopaedic/sports medicine fellows and more than 30 primary care sports medicine fellows who have trained under him through the American Sports Medicine Institute Sports Medicine Fellowship Program. Involved in education and research in sports medicine and orthopaedic surgery, he has made major presentations on every continent, and has authored numerous scientific articles and books.

Doctor Andrews attended from Louisiana State University in 1963, where he was Southeastern Conference indoor and outdoor pole vault champion. He completed LSU School of Medicine in 1967, and completed his orthopaedic residency at Tulane Medical School in 1972. He had surgical fellowships in sports medicine at the University of Virginia Medical School in 1972 with Doctor Frank McCue, III, and at the University of Lyon, Lyon, France in 1972 with the late professor Albert Trillat, M.D., who was known as the Father of European Knee Surgery.

Doctor Andrews is a member of the American Board of Orthopaedic Surgery and the American Academy of Orthopaedic Surgeons. He has served on the Board of Directors of the American Orthopaedic Society of Sports Medicine, and served as Secretary of that Board from May 2004 to May 2005. Currently he is the Second Vice President of this prestigious Society. He has served on the Board of Directors of the Arthroscopy Association of North America and the International Knee Society. He is Clinical Professor of Orthopaedic Surgery at the University of Alabama Birmingham Medical School, the University of Virginia School of Medicine, the University of Kentucky Medical Center, and the University of South Carolina Medical School. He has been awarded a Doctor of Laws Degree from Livingston University, Doctor of Science Degree from Troy State University and a Doctor of Science Degree from Louisiana State University.

At present, Doctor Andrews serves as Co-Medical Director for Intercollegiate Sports at Auburn University. He is Senior Orthopaedic Consultant for Intercollegiate Athletics at the University of Alabama. He is the orthopaedic consultant for the athletic teams of Troy University, University of West Alabama, Tuskegee University and Grambling University.

He is the Senior Orthopaedic Consultant for the Washington Redskins Professional Football team.

He is the Medical Director for the Tampa Bay Devil Rays Professional Baseball Team. He is the team physician for the Birmingham Barons Double A Professional Baseball Team, an affiliate of the Chicago White Sox.

He is Co-Medical Director of the Ladies Professional Golf Association.

He has been a member of the Sports Medicine Committee of the United States Olympic Committee having served during the last two previous quadrenniums.

He has served on the NCAA Competitive Safeguards in Medical Aspects of Sports Committee.

He currently serves on the Medical and Safety Advisory Committee of USA Baseball.

He serves on the Board of Directors of the following companies: FastHealth Corporation, and Robins Morton Construction Company. He is a member of Troy University’s Board of Trustees.

Doctor Andrews has been inducted into the Alabama Sports Hall of Fame and was named recipient of the Alabama Sports Hall of Fame 1992 Distinguished Sportsman Award. In 1996, Doctor Andrews was inducted into the LSU Alumni Hall of Distinction. Recently he was awarded the Alumni of the Year for his alma mater LSU.

Doctor Andrews and his wife, Jenelle have six children, Andy, Amy, Archie, Ashley, Amber, Abby and three grandchildren.

Yacht racing is one of Doctor Andrews’ keen interests. His 50-foot racing sloop, Abracadabra III, won the 1990 International 50-Foot Yacht Association World Cup. He has also won many other yacht racing off shore regattas. His offshore racing sloop Abracadabra was recently named one of the best 100 vessels of the twentieth century by Sail Magazine. He served as President and Chairman of the Board of Aloha Racing Foundation, an America’s Cup XXX Syndicate based in Honolulu, Hawaii, which challenged for the 2000 America’s Cup contested in Auckland, New Zealand. His other hobbies include golf and hunting.

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