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Youth Throwers Respond to Stretching

Shoulder Posterior Capsular Contracture in Youth Baseball Players: It Can be Improved by Stretching

Status
UNKNOWN
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT01065181
Acronym
Safethrow
Enrollment
1261
Registered
2010-02-09
Start date
2008-01-31
Completion date
2019-09-30
Last updated
2018-03-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Shoulder Posterior Capsular Contracture

Keywords

shoulder, posterior inferior glenohumeral ligament, posterior capsule, capsular contracture, baseball, throwing injury

Brief summary

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.

Detailed 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.

Interventions

None listed

Sponsors

Metzger, Charles, M.D.
Lead SponsorINDIV

Study design

Observational model
COHORT
Time perspective
CROSS_SECTIONAL

Eligibility

Sex/Gender
MALE
Age
8 Years to 15 Years
Healthy volunteers
Yes

Inclusion criteria

* male * baseball player * ages 8 to 15

Exclusion criteria

* female (suspected hormonal/gender influences on capsular elasticity) * prior throwing arm surgery

Design outcomes

Primary

MeasureTime frameDescription
Degree of decrease in internal rotation contracture of the shoulderOne yearGIRD is the Glenohumeral Internal Rotation Deficit. It is the difference in the internal rotation of the throwing shoulder compared to the non-throwing shoulder

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026