Graduate Research Papers

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Open Access Graduate Research Paper

Abstract

Context: Long-toss throwing protocols are common arm conditioning practices used among elite level pitchers; however, this practice could cause an increase in inferior glenohumoral laxity that could be considered unhealthy (10-21 mm). Objective: Compare the amount of non-throwing and throwing arm glenohumeral laxity before and after the long-toss throwing protocol. Design: Repeated measures Setting: Laboratory Participants: 10 healthy, male, collegiate pitchers(age 20.4 ± 0.97, height 185.7 ± 4.7 cm, weight 89.3 ± 4.9 kg.) in accordance with IRB. Intervention: Measure the inferior displacement of the glenohumeral joint in the dominant and non-dominant shoulder before and after a long toss routine. Main Outcome Measure: Two-dimensional distance between the superior aspect of the acromionclavicular joint and the humeral lateral epicondyle. Results: An arm and time interaction was detected. Both shoulder distances were similar(P < .5) before throwing (Throwing: 12.4 mm; Non-Throwing: 14 mm). Following the long-toss throwing protocol, a difference was not detected(P < .2) in the Non-Throwing(l 1.3 mm), however, a 10.9 mm increase was detected (P = .004) in the Throwing(23.3 mm) Conclusion: Performing a long-toss regime following a few days of rest increases a collegiate-level pitcher's acute glenohumeral inferior laxity, but the total laxity gained should not be of concern. .

Year of Submission

2011

Degree Name

Master of Science

Department

Division of Athletic Training

First Advisor

Jody B. Brucker

Comments

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Date Original

2011

Object Description

1 PDF (vi, 48 pages)

Language

en

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