This trial is active, not recruiting.

Condition shoulder posterior capsular contracture
Sponsor Metzger, Charles, M.D.
Start date January 2008
End date December 2010
Trial size 1261 participants
Trial identifier NCT01065181, Safethrow01


The purpose of this study is to document the rates of youth baseball player demographics, incidence of arm pain, usage of different pitch types, and degree of internal rotation contracture in the throwing versus the non-throwing shoulder. We followed a subgroup of players for a year to see if a particular stretch would help reduce the internal rotation contracture.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Observational model cohort
Time perspective cross-sectional

Primary Outcomes

Degree of decrease in internal rotation contracture of the shoulder
time frame: One year

Eligibility Criteria

Male participants from 8 years up to 15 years old.

Inclusion Criteria: - male - baseball player - ages 8 to 15 Exclusion Criteria: - female (suspected hormonal/gender influences on capsular elasticity) - prior throwing arm surgery

Additional Information

Official title Shoulder Posterior Capsular Contracture in Youth Baseball Players: It Can be Improved by Stretching
Principal investigator Charles L Metzger, MD
Description Introduction: Overhead throwing can cause contracture of the shoulder posterior-inferior glenohumeral ligament which can lead to injuries such as superior labral tears. We show that instruction on stretching can favorably alter progression of posterior contractures. Methods: 1261 male baseball players ages 7-15 completed a questionnaire and shoulder examinations. Measurements of rotation of both shoulders were made with the subjects in the supine position with the scapula stabilized. Glenohumeral internal rotation deficit (GIRD) was calculated. Pitch type and player position, among other variables, were recorded. The prospective cohort was 175 players who were examined twice a year apart. Players with excessive GIRD (exGIRD) were given stretching instruction, and the control group was those without exGIRD who were not given instruction. Change in GIRD as a result of this intervention was documented.
Trial information was received from ClinicalTrials.gov and was last updated in February 2010.
Information provided to ClinicalTrials.gov by Metzger, Charles, M.D..