| Dynamic acromiohumeral interval changes in baseball players during scaption exercises. | |
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MedLine Citation:
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PMID: 21050780 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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HYPOTHESIS: Elevation of the arm during a dynamic scaption exercise will result in a progressive narrowing of the acromiohumeral interval (AHI); however, the addition of a load will not significantly affect the AHI in healthy baseball players. MATERIALS AND METHODS: Thirteen healthy baseball players performed a seated scaption exercise from 0° to 90°, with and without a normalized additional load. Dynamic AHI intervals were measured using digital fluoroscopic videos with the arm at the side, and at 30°, 45°, 60°, and 75° of humeral elevation. RESULTS: The mean AHI for unloaded and loaded scaption decreased significantly (P < .001) from the arm at the side (12.7 mm) until 45° (4.9 mm), further changes in the mean AHI between 45°, 60°, and 75° were not significantly different. Generally, loaded scaption resulted in smaller AHI values at 45°, 60°, and 75°; however, only the differences at 60° (P = .005) and 75° (P = .003) were significant. DISCUSSION: Narrowing of the AHI during dynamic motion was similar to previous reports of static AHI, with the exception of the trend towards widening of the AHI seen at 75° during both conditions. The additional AHI narrowing observed at 60° and 75° during the loaded exercise may indicate that scapular positioning is more influential in this range. CONCLUSION: An additional AHI narrowing of 11% during loaded scaption, did not result in any clinical impingement during the exercise, but may have more serious implications in other healthy and pathologic populations. |
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Authors:
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Melissa D Thompson; Dennis Landin; Phillip A Page |
Publication Detail:
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Type: Journal Article Date: 2010-11-03 |
Journal Detail:
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Title: Journal of shoulder and elbow surgery / American Shoulder and Elbow Surgeons ... [et al.] Volume: 20 ISSN: 1532-6500 ISO Abbreviation: J Shoulder Elbow Surg Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-01-31 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9206499 Medline TA: J Shoulder Elbow Surg Country: United States |
Other Details:
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Languages: eng Pagination: 251-8 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Journal of Shoulder and Elbow Surgery Board of Trustees. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Kinesiology, Louisiana State University, Baton Rouge, LA, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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