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Volleyball spikes under fatigue: study probes shoulder changes

NCT ID NCT07687550

Knowledge-focused Sponsor: National Yang Ming Chiao Tung University 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 This study
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
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 Results may not be published yet.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)
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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This status has not been confirmed recently, so it may be out of date.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 Jul 07, 2026 · Last updated Jul 08, 2026 · Updated 1 time

Summary

This study looks at how repetitive overhead movements, like volleyball spikes, affect shoulder mechanics and structures when muscles are tired. Healthy recreational volleyball players perform a fatigue protocol using Thera-band exercises, and researchers measure joint angles, muscle activation, and shoulder space using motion tracking and ultrasound. The goal is to understand fatigue-related changes and compare players with good versus poor shoulder control.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Upper Extremity Muscle Fatigue Protocol (Thera-band exercises)
What this could lead to
If successful, this could help design training or injury prevention programs for volleyball players to reduce shoulder strain during spikes.
What could go wrong
This is a small observational study with only 35 participants, so findings may not apply to all athletes or to game-like conditions.

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

About 35 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jan 2027

An estimate. End dates often move.

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

Healthy recreational volleyball players

Ages

18 to 35 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: * Between 18 and 35 years old * At least 2 consecutive years of volleyball experience * Involved in volleyball practice or game for at least 4 hours per week * Able to perform a cross-body spike with 3-step Exclusion Criteria: * A history of major shoulder or spinal injury or surgery * Experiencing shoulder pain (VAS ≥ 3/10) in the last 6 months

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Conditions

The condition(s) this trial relates to.

Fatigue

As listed by the trial registrant

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

Fatigue

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • National Yang Ming Chiao Tung University

    Taipei, 112, Taiwan

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