An observational study in Healthy Subjects, sponsored by Loma Linda University. Recruiting at 1 site in United States. Open to participants aged 15 Years to 22 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-08-31.
Sponsored by Loma Linda University · Observational
The purpose of this graduate student research study is to transform the existing concepts surrounding shoulder strength in baseball players, particularly in the context of retroverted shoulders.
The study aims to investigate the influence of biological age on shoulder strength in comparison to chronological age, providing insights into how these factors might interact in the context of athletic performance. Additionally, the investigators seek to develop a novel framework for injury prevention in baseball, addressing the critical research gap identified in the scope review. Furthermore, the investigators will conduct a comparative analysis between two different countries to deepen the understanding of baseball-related injuries, ultimately fostering a more comprehensive approach to athlete safety and health in the sport.
Loma Linda University is the lead sponsor of 306 studies on the registry; 46 are open to participants now.
Of its 29 completed or terminated interventional studies of FDA-regulated products, 23 (79%) have results posted.
Counted across the registry records on this site, refreshed daily.
Baseball players from schools in the United States and Japan.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
A diagnosis of a current injury that prevents participation in baseball activities.
Other: Strength and Range of Motion
Other: Strength and Range of Motion
Shoulder external rotation and internal rotation strength will be measured with a dynamometer at the end range, as well as at retroverted shoulder neutral and zero degrees for three times. Grip strength will also be measured three times using the dynamometer after the shoulder strength assessments.
Strength
Shoulder external rotation and internal rotation strength will be measured with a dynamometer at the end range, as well as at retroverted shoulder neutral and zero degrees for three times. Grip strength will also be measured three times using the dynamometer after the shoulder strength assessments.
Time frame: baseline reading on visit one
Plan to share: No
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