Muscle Strength and Range of Motion in Adolescent Pitchers with Throwing-Related Pain
- 2 July 2008
- journal article
- research article
- Published by SAGE Publications in The American Journal of Sports Medicine
- Vol. 36 (11), 2173-2178
- https://doi.org/10.1177/0363546508319049
Abstract
Background A high prevalence of throwing-related shoulder and elbow pain has been documented in adolescent baseball pitchers. Hypothesis Pitchers with a history of throwing-related pain will have weakened dominant-arm posterior shoulder musculature and greater dominant-arm glenohumeral total range of motion (ROM) loss compared with pitchers without throwing-related pain. Study Design Controlled laboratory study. Methods Twenty-three adolescent pitchers (age 15.7 ±1.4 years) were tested. Twelve pitchers had throwing-related pain in the prior season and were currently symptom-free, while the remaining 11 pitchers had no such history of pain. Internal and external rotation ROM and muscle strength (lower trapezius, middle trapezius, rhomboids, latissimus dorsi, supraspinatus, internal rotators, external rotators) were measured bilaterally. Dominant versus nondominant differences in ROM and strength were compared between pitchers with and without throwing-related pain. Results As a whole, the group of 23 pitchers had a loss of internal rotation ROM (13° ± 10°, P < .001) and gain in external rotation ROM (11° ± 10°, P < .001) on the dominant versus nondominant arm, with no effect on total ROM (2° ± 7° loss, P = .14). There was no difference in bilateral comparison of total ROM between pitchers with and without throwing-related pain. Dominant versus nondominant muscle strength was lower ( P < .05) for the pain group versus nonpain group for the middle trapezius (7% ± 19% vs 22% ± 12%) and supraspinatus (−4% ± 27% vs 14% ± 14%) and higher (P < .05) for the internal rotators (19% ± 14% vs 6%±12%). Conclusion Throwing-related pain in this population may be due to the inability of weakened posterior shoulder musculature to tolerate stress imparted on it by adaptively strengthened propulsive muscles. Clinical Relevance Selective posterior shoulder strengthening may be indicated in rehabilitative and injury prevention programs for adolescent pitchers.This publication has 27 references indexed in Scilit:
- Correlation of Range of Motion and Glenohumeral Translation in Professional Baseball PitchersThe American Journal of Sports Medicine, 2005
- The disabled throwing shoulder: spectrum of pathology part III: the SICK scapula, scapular dyskinesis, the kinetic chain, and rehabilitationArthroscopy: The Journal of Arthroscopic & Related Surgery, 2003
- The disabled throwing shoulder: Spectrum of pathology part I: Pathoanatomy and biomechanicsArthroscopy: The Journal of Arthroscopic & Related Surgery, 2003
- Glenohumeral joint total rotation range of motion in elite tennis players and baseball pitchersMedicine & Science in Sports & Exercise, 2002
- Osseous Adaptation and Range of Motion at the Glenohumeral Joint in Professional Baseball PitchersThe American Journal of Sports Medicine, 2002
- Assessment of Shoulder Strength in Professional Baseball PitchersJournal of Orthopaedic & Sports Physical Therapy, 2000
- Manual scapular stabilization: Its effect on shoulder rotational range of motionArchives of Physical Medicine and Rehabilitation, 2000
- Shoulder Motion and Laxity in the Professional Baseball PlayerThe American Journal of Sports Medicine, 1997
- Concentric Isokinetic Shoulder Internal and External Rotation Strength in Professional Baseball PitchersJournal of Orthopaedic & Sports Physical Therapy, 1997
- A comparative electromyographic analysis of the shoulder during pitchingThe American Journal of Sports Medicine, 1987