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Brain study reveals how shoulder tightness affects pitching in baseball players

NCT ID NCT06704529

Knowledge-focused Sponsor: National Taiwan University Hospital Source: ClinicalTrials.gov ↗

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looked at how the brain handles body awareness (proprioception) in baseball players with a condition called glenohumeral internal rotation deficit (GIRD), which causes shoulder tightness. Researchers measured brain activity and shoulder position sense in 98 active players and linked these to pitching speed and accuracy. The goal was to understand the brain's role in pitching performance for players with GIRD.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

98 people

The number who actually took part.

Started

Aug 2024

Finished

Jul 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

GIRD is defined as 20° less GH IR ROM in the dominant shoulder compared to the non-dominant shoulder. Players without GIRD will be recruited to match the characteristics and sports involvement data (age ±3 years, right-handed or left-handed, pitcher or fielder, practice time \>10 hours/week or \<10 hours/week, baseball experience \>3 years or \<3 years) of the GIRD players.

Ages

15 to 40 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * playing baseball for at least one year * still active in training or competition * frequency of training or games should be at least 3 hours per week Exclusion Criteria: * current dominant upper extremities pain * a history of upper extremities surgical interventions or fractures or dislocation or degenerative joint disease * cervical radiculopathy within 6 months * lower extremities injury or surgery within the current 6 months * Visual analog scale (VAS) \> 5 during movement in the experiment

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Glenohumeral internal rotation deficit

Contacts and locations

Locations

  • Institute of Physical Therapy, National Taiwan University

    Taipei, Taiwan, 100, Taiwan