Shoulder strength in baseball players with retroverted shoulders
Official title: Shoulder Strength in Light of Retroversion and Biological Age in Baseball Players
Run by Loma Linda University · NCT07209423 · Data updated 2026-11-12
This study tests how biological age vs. chronological age affects shoulder strength in healthy baseball players to inform injury prevention.
Quick facts
| Study type | Observational |
|---|---|
| Ages | 15 Years to 22 Years |
| Sex | All |
| Enrollment | 120 (estimated) |
| Sponsor | Loma Linda University Academic / other |
| Locations | 1 site (Loma Linda, California) |
| Status | Recruiting |
| Started | April 23, 2026 |
| Main results expected | April 2027 |
| Study ends | April 2027 |
| Registry record updated | August 31, 2026 |
| Trial ID | NCT07209423 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Healthy baseball players who are able to participate in baseball activities and understand English or Japanese.
✕Probably not a fit
Participants with current injuries or conditions that prevent baseball activity are unlikely to benefit.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This observational study examines the relationship between biological age and shoulder strength in baseball players, with a focus on retroverted shoulders. Researchers will measure strength and range of motion and compare results across ages. The study also aims to develop a framework for injury prevention and compare findings between two countries, using Loma Linda University as the lead site. Participants will be healthy volunteers who actively participate in baseball and can understand English or Japanese. The study envisions contributing to safer training practices and better understanding of how age-related factors influence shoulder performance in athletes.
Why it matters
Potential benefit: If successful, findings could improve injury prevention strategies and training programs for baseball players.
How similar studies have gone: Previous research has explored age-related shoulder changes, but this study’s cross-country comparison and focus on biological age in baseball is relatively novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
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.
Where it's running
-
Loma Linda U
Loma Linda, California, United States Recruiting
Study contacts
- Principal investigator: Everett Lohman, DSc — Loma Linda University
- Study coordinator: Everett Lohman, DSc
- Email: elohman@llu.edu
- Phone: 909) 558-1000 Ext. 83171
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
-
See if extra prenatal breastfeeding education helps moms in Inland Empire breastfeed exclusively
This study tests whether supplemental breastfeeding education during pregnancy increases exclusive breastfeeding at 6 weeks after birth for first-time moms or those who didn’t breastfeed long in the past.
-
Comparing two surgical techniques for testicular cancer treatment
This study is testing if a new surgical method for treating testicular cancer can help patients feel less pain and need fewer pain medications after surgery compared to the standard method.
-
Occupational therapy program for adults affected by intimate partner violence
This program will try eight occupational therapy sessions to see if they help adults in a domestic violence shelter improve daily activities and coping.
-
Examining gum changes after removing an implant crown
This study is testing how the gums change after taking off an implant crown to see how long it takes for those changes to happen, which is important for making new crowns look good.
-
Effects of suctioning on pain and stress in intubated ICU patients
This study is testing if suctioning the breathing tube in ICU patients causes more pain and stress compared to not suctioning.
-
Comparing muscle response monitoring using median and ulnar nerves during surgery
This study is testing if monitoring muscle responses from the median nerve during surgery is just as good as using the ulnar nerve for people under general anesthesia.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.