Adolescent DevelopmentNCT06759779
Inspiratory and Expiratory Muscle Training in Adolescent Volleyball Players
A study testing inspiratory muscle training and expiratory muscle training in people with Adolescent Development, run by Gazi University at 1 site in Turkey (Türkiye).
Trial summary
This study will investigate the effects of inspiratory and expiratory muscle training on respiratory muscle strength, pulmonary function, and performance status in adolescent athletes Read more about this study
- Who is it for?
- Ages 12 to 18 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Adolescent Development
- What is being tested?
- inspiratory muscle training and expiratory muscle training
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 26 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Jul 2023to 1 Mar 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 12 to 18 years
- Women only
- Healthy volunteers accepted
- Child, Adult
Who may be able to join
- Athletes aged 12-18 who train at a submaximal level at least 3 days a week
Who cannot join
- Adolescents with any history of chronic lung disease
- unable to comply with the test and training
- unwilling to participate in the study
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Inspiratory and Expiratory Muscle Strength Training on Respiratory Functions and Performance in Adolescent Volleyball Players
This study will investigate the effects of inspiratory and expiratory muscle training on respiratory muscle strength, pulmonary function, and performance status in adolescent athletes
Read the detailed description
In the literature, it has been shown in a limited number of studies that respiratory muscle training in sports such as football, cycling, swimming, and rugby reduces athletes' perceived exertion levels. However, the effects of inspiratory and expiratory muscle training on respiratory muscle strength, pulmonary function, and performance status in adolescent athletes are still unclear. Therefore, this study has been planned.
- Conditions
- Adolescent Development
- Being tested
- inspiratory muscle training, expiratory muscle training
- Keywords
- pulmonary functions, muscle training, adolescent health, volleyball players
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
inspiratory muscle trainingDevice
Inspiratory muscle training will be performed
expiratory muscle trainingDevice
Expiratory muscle training will be performed
| Study group | Role | What they receive |
|---|---|---|
| inspiratory muscle training group | Experimental | Not described Receives: Device: inspiratory muscle training |
| expiratory muscle training group | Experimental | Not described Receives: Device: expiratory muscle training |
What is being measured
The primary outcome is the main question the study is designed to answer.
Respiratory muscle strength
Maximal inspiratory and expiratory muscle strength will be evaluated using mouth pressure device .
Measured: First day
Diaphragm thickness
Diaphragm thickness will be assessed using ultrasonography.
Measured: Second day
Secondary outcomes (11)
Constant load-inspiratory muscle endurance test
It will be evaluated with inspiratory muscle trainer
Measured: First day
FEV1
ulmonary function tests will be performed using a spirometry according to the American Thoracic Society and European Respratory Society criteria. FEV1 will be evaluated. The percentage of predicted value <70% will be expressed as abnormal
Measured: First day
FVC
ulmonary function tests will be performed using a spirometry according to the American Thoracic Society and European Respratory Society criteria. FEV1 will be evaluated. The percentage of predicted value <70% will be expressed as abnormal
Measured: First day
FEV1/FVC
Pulmonary function tests will be performed using a spirometry according to the American Thoracic Society and European Respratory Society criteria. FEV1/FVC will be evaluated.
Measured: First day
PEF
Pulmonary function tests will be performed using a spirometry according to the American Thoracic Society and European Respratory Society criteria. PEF will be evaluated. The percentage of predicted value <70% will be expressed as abnormal
Measured: First day
FEF2575
Pulmonary function tests will be performed using a spirometry according to the American Thoracic Society and European Respratory Society criteria. FEF2575 will be evaluated. The percentage of predicted value <50% will be expressed as abnormal
Measured: First day
Athletic performance
Performance will be evaluated with shuttle run test
Measured: second day
Fat free mass Body compositions
Fat free mass (kg) will be evaluated with bioelectrical impedance analyzer
Measured: second day
Fat mass Body compositions
Fat mass (kg) will be evaluated with bioelectrical impedance analyzer
Measured: second day
Fat percentage Body compositions
Fat percentage (%) will be evaluated with bioelectrical impedance analyzer
Measured: second day
Diaphragm stiffness
Diaphragm stiffness will be assessed using shear-wave elastography.
Measured: second day
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jan 2025
- Study start1 Jul 2023
- Primary completion1 Feb 2025
- Study completion1 Mar 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Adolescent DevelopmentStudies of the same condition, open and under way.
- More trials run by Gazi UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 26 participants (actual)
Sponsor and investigators
- Lead sponsor
- Gazi University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Zeliha ÇELİK, Amasya University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06759779
- Sponsor's protocol ID
- 474032
- Status last verified
- Sep 2026
- First submitted
- 13 Dec 2024
- Last updated
- 22 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Publications
Celik Z, Demirtas G, Guzel NA, Sendur HN, Keles MN, Karatas N, Kokturk N. Comparative effects of inspiratory and expiratory muscle training on diaphragm adaptations and respiratory function in adolescent athletes: a randomized-controlled study. BMC Pediatr. 2026 Oct 8;26(1):996. doi: 10.1186/s12887-026-07817-z.
PubMed 42870242
Study at a glance
From the registry record, last updated by the sponsor on 22 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Inspiratory and Expiratory Muscle Strength Training on Respiratory Functions and Performance in Adolescent Volleyball Players
- ClinicalTrials.gov ID
- NCT06759779
- Acronym / sponsor ID
- 474032
- Conditions
- Adolescent Development
- Keywords
- pulmonary functions, muscle training, adolescent health, volleyball players
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 26 participants (actual)
- Lead sponsor
- Gazi UniversityUniversity, hospital or other
- Study start
- 1 Jul 2023 (actual)
- Primary completion
- 1 Feb 2025 (actual)
- Study completion
- 1 Mar 2025 (actual)
- First posted
- 6 Jan 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study will investigate the effects of inspiratory and expiratory muscle training on respiratory muscle strength, pulmonary function, and performance status in adolescent athletes
Detailed description
In the literature, it has been shown in a limited number of studies that respiratory muscle training in sports such as football, cycling, swimming, and rugby reduces athletes' perceived exertion levels. However, the effects of inspiratory and expiratory muscle training on respiratory muscle strength, pulmonary function, and performance status in adolescent athletes are still unclear. Therefore, this study has been planned.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| inspiratory muscle training group | Experimental | Device: inspiratory muscle training |
| expiratory muscle training group | Experimental | Device: expiratory muscle training |
Who may qualify
- Ages
- 12 to 18 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
Key inclusion criteria (1 listed)
- Athletes aged 12-18 who train at a submaximal level at least 3 days a week
Key exclusion criteria (3 listed)
- Adolescents with any history of chronic lung disease
- unable to comply with the test and training
- unwilling to participate in the study
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| inspiratory muscle trainingInspiratory muscle training will be performed | Device | inspiratory muscle training group |
| expiratory muscle trainingExpiratory muscle training will be performed | Device | expiratory muscle training group |
Primary outcome
Respiratory muscle strength
Time frame: First day
Maximal inspiratory and expiratory muscle strength will be evaluated using mouth pressure device .
Diaphragm thickness
Time frame: Second day
Diaphragm thickness will be assessed using ultrasonography.
11 secondary outcomes
Constant load-inspiratory muscle endurance test
Time frame: First day
FEV1
Time frame: First day
FVC
Time frame: First day
FEV1/FVC
Time frame: First day
PEF
Time frame: First day
FEF2575
Time frame: First day
Athletic performance
Time frame: second day
Fat free mass Body compositions
Time frame: second day
Fat mass Body compositions
Time frame: second day
Fat percentage Body compositions
Time frame: second day
Diaphragm stiffness
Time frame: second day
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Sep 2026.
- Derived from this study: PubMed 42870242Celik Z, Demirtas G, Guzel NA, Sendur HN, Keles MN, Karatas N, Kokturk N. Comparative effects of inspiratory and expiratory muscle training on diaphragm adaptations and respiratory function in adolescent athletes: a randomized-controlled study. BMC Pediatr. 2026 Oct 8;26(1):996. doi: 10.1186/s12887-026-07817-z.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing inspiratory muscle training and expiratory muscle training in people with Adolescent Development, run by Gazi University at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 22 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Respiratory muscle strength (time frame: First day). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT06759779, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Sep 2026; AzTrials last refreshed its copy on 8 Nov 2026.