Recruiting

Shoulder Strength

Sponsor:

Loma Linda University

Code:

NCT07209423

Conditions

Healthy Subjects

Eligibility Criteria

Sex: All

Age: 15 - 22

Healthy Volunteers: Accepted

Interventions

Strength and Range of Motion

Study Details

Brief summary:

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.

Conditions

Healthy Subjects

Study ID

NCT07209423

Start date

Apr 23, 2026

Status verified date

Aug, 2026

Completion date

Apr, 2027

Anticipated

Primary completion date

Apr, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 15 - 22

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Able to participate in baseball activities
  • All races and ethnicities.
  • Speaks and understands English or Japanese.

Exclusion Criteria:

A diagnosis of a current injury that prevents participation in baseball activities.

  • Orthopedic conditions (e.g., muscle strain, ligament sprain)
  • Vascular history (e.g., blood clots, vascular surgery, varicose veins)
  • Neurological history (e.g., stroke, nerve injury, or cognitive impairment)
  • Cardiopulmonary conditions (e.g., hypertension, heart disease)
  • Any history of bleeding or clotting disorders
  • Diabetes, cancer, rhabdomyolysis, or compartment syndrome
  • Additionally, not maintaining participant's regular diet on the day of the research will also impact eligibility.

Study Design

Enrollment

120 participants

Anticipated

Interventions and Outcome Measures

Arms

Baseball players in the United States

Baseball players in Japan

Interventions

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.

Primary outcome measure

  • Strength [ Time Frame: baseline reading on visit one ]

Central Contacts and Locations

Central contacts

Everett Lohman, DSc

909) 558-1000 Ext. 83171elohman@llu.edu

Locations

Loma Linda U

Recruiting

Loma Linda, California, United States, 92354

Contacts

Everett B Lohman, DSc

909-558-1000Elohman@llu.edu

More Information

Sponsor

Loma Linda University

Last update posted

Aug 31, 2026

Last verified

Aug, 2026

Keywords

  • baseball
  • shoulder

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by Loma Linda University on 2026-08-31.