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Could a diaphragm massage give athletes a power edge?

NCT ID NCT07784517

Symptom relief Sponsor: Istinye University Source: ClinicalTrials.gov ↗

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 25, 2026 · Last updated Aug 28, 2026 · Updated 3 times

Summary

This trial tests whether a single 15-minute session of manual diaphragmatic facilitation—a hands-on technique targeting the main breathing muscle—can immediately improve upper extremity performance and respiratory function in volleyball players. Fifty active players aged 18 to 30 will receive either the real technique or a sham version after a warm-up. Researchers will measure lung function, breathing muscle strength, and arm power, stability, and endurance before and after to see if the diaphragm's role in trunk stabilization translates into better athletic performance.

What this could mean

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

Active substance
Manual diaphragmatic facilitation
What this could lead to
If effective, this simple manual technique could become a quick pre-game or training method to enhance arm power, stability, and breathing in athletes.
What could go wrong
This is a small, early-stage study with only 50 participants and a single session, so results may not apply broadly. The sham control helps, but the effect may be small or short-lived.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 50 people

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

Expected to start

Aug 2026

An estimate. Start dates often move.

Expected to finish

Nov 2026

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.

Ages

18 to 30 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: * Aged between 18 and 30 years. * Regularly participating in volleyball for at least one year. * Training at least twice per week or actively participating in volleyball at the league or tournament level. * No history of a serious upper extremity or trunk injury within the previous six months, i-including injuries affecting the shoulder, scapular region, or spine. * No diagnosed chronic respiratory disease, including asthma, chronic obstructive pulmonary disease, or allergic bronchitis. * Willing and able to provide written informed consent. Exclusion Criteria: * History of surgery involving the upper extremity, spine, or trunk within the previous six months, including shoulder arthroscopy or spinal disc surgery. * Presence of an active musculoskeletal injury, including tendinopathy, bursitis, or ligament injury. * Presence of a diagnosed respiratory disease, including asthma, chronic obstructive pulmonary disease, or bronchiectasis. * Presence of a diagnosed postural or spinal deformity that may affect study assessments, including scoliosis, clinically significant kyphosis, or clinically significant lordosis. * History of a neurological or cardiovascular disease.

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Conditions

The condition(s) this trial relates to.

Respiratory Aspiration

As listed by the trial registrant

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

Volleyball players

How to take part

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  1. The places running it

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

  2. The official record

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Contacts and locations

Locations

  • Istinye University

    RECRUITING

    Istanbul, 34010, Turkey (Türkiye)

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