Author : Charles Leddon
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (95 download)
Book Synopsis The Effect of Rotational Range of Motion Deficits on Glenohumeral Joint Force Production and Capsuloligamentous Laxity in Collegiate Baseball Pitchers by : Charles Leddon
Download or read book The Effect of Rotational Range of Motion Deficits on Glenohumeral Joint Force Production and Capsuloligamentous Laxity in Collegiate Baseball Pitchers written by Charles Leddon and published by . This book was released on 2015 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Decreases in glenohumeral (GH) rotation motion and rotator cuff strength have been linked to multiple pathologies in the throwing arms of baseball pitchers, but a full understanding of the shoulder mechanisms affected by a total arc of motion deficit (TAMD) has not yet been achieved. This study was designed to quantify the effects that this loss in range of motion has on GH joint laxity and eccentric external and internal rotation strength measures. We recruited 47 intercollegiate baseball pitchers with no history of shoulder or elbow surgery, and assigned them to either a TAMD group or a Non-TAMD group based on the extent of their loss of rotational motion at the shoulder. Eccentric internal and external rotation peak force values were evaluated in the middle 70% of the pitchers' available rotational range of motion with an isokinetic dynamometer, while anterior and posterior GH joint laxity and stiffness were assessed with a multijoint arthrometer under a 150N load applied at a rate of 15-19 N/s, with stiffness calculated as the slope of the force displacement curve following the inflection point representing the point of soft tissue compression. We found significant differences in the stiffness measures when comparing the anterior to the posterior directions in both the dominant (22.64 ± 5.02 N/mm and 28.72 ± 7.18 N/mm, p