Abstract:
:Context: Professional baseball players must achieve a delicate balance between shoulder mobility and stability to attain optimal sports performance. The sport-specific demands of repetitive overhead throwing may result in an altered mobility-stability relationship.Objective: To evaluate clinical measures of shoulder mobility in professional baseball players in order to examine differences between the throwing and the nonthrowing shoulders and to describe chronic adaptations to throwing.Design: Descriptive.Setting: The athletic training room at Maryvale Baseball Park, Phoenix, AZ.Patients or Other Participants: Twenty-seven professional baseball players (20 pitchers, 7 position players; age = 20 +/- 1.6 years, height = 190.5 +/- 4.8 cm, mass = 91.6 +/- 9.6 kg) with no previous history of shoulder or elbow injury.Main Outcome Measure(s): We recorded scapular upward rotation at 4 levels of humeral elevation in the scapular plane (rest, 60 degrees , 90 degrees , 120 degrees ); posterior shoulder tightness; and passive, isolated glenohumeral joint internal and external range of motion.Results: Scapular upward rotation was significantly greater in the throwing shoulder (14.2 +/- 6.5 degrees ) than in the nonthrowing shoulder (10.6 +/- 6.1 degrees ) at 90 degrees of humeral elevation (P = .04). We observed no statistically significant difference in posterior shoulder tightness between the throwing (30.2 +/- 4.6 cm) and the nonthrowing (28.0 +/- 4.8 cm) shoulder (P = .09). In addition, the throwing shoulder exhibited a statistically significant decrease in isolated glenohumeral internal rotation (56.6 +/- 12.5 degrees ) compared with the nonthrowing shoulder (68.6 +/- 12.6 degrees ) (P = .001), with a concomitant increase in isolated glenohumeral external rotation (throwing = 108.9 +/- 9.0 degrees , nonthrowing = 101.9 +/- 5.9 degrees , P = .0014). An analysis of the total arc of motion (internal rotation + external rotation) revealed no statistically significant difference between sides (P = .15).Conclusions: The throwing shoulder exhibited significant differences in scapular and glenohumeral mobility compared with the nonthrowing shoulder. Further research is necessary to determine the relation of these adaptive changes, if any, to shoulder injury and disability.
journal_name
J Athl Trainjournal_title
Journal of athletic trainingauthors
Downar JM,Sauers ELkeywords:
subject
Has Abstractpub_date
2005-03-01 00:00:00pages
23-29issue
1eissn
1062-6050issn
1938-162Xjournal_volume
40pub_type
杂志文章abstract::OBJECTIVE: To establish a time profile to determine how athletic training students use their time in clinical placements and to determine the effects of academic standing, sex, sport type, and risk of injury associated with a sport during athletic training students' clinical placements on instructional, clinical, unen...
journal_title:Journal of athletic training
pub_type: 杂志文章
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journal_title:Journal of athletic training
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journal_title:Journal of athletic training
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journal_title:Journal of athletic training
pub_type: 杂志文章
doi:10.4085/78-20
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journal_title:Journal of athletic training
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journal_title:Journal of athletic training
pub_type: 杂志文章,随机对照试验
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journal_title:Journal of athletic training
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journal_title:Journal of athletic training
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doi:10.4085/1062-6050-48.3.07
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journal_title:Journal of athletic training
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更新日期:2007-01-01 00:00:00
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doi:
更新日期:2003-12-01 00:00:00
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pub_type: 杂志文章
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journal_title:Journal of athletic training
pub_type: 杂志文章
doi:
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