Acute Effects of Functional Inspiratory Muscle Training in Elite Male Volleyball Players (NCT07763002) | Clinical Trial Compass
RecruitingNot Applicable
Acute Effects of Functional Inspiratory Muscle Training in Elite Male Volleyball Players
Turkey (Türkiye)30 participantsStarted 2026-05-01
Plain-language summary
This randomized controlled trial evaluates the acute effects of a single session of functional inspiratory muscle training on muscle oxygenation, exercise capacity, dynamic balance, and agility in elite male volleyball players aged 18 to 25 years. Thirty participants will be randomly assigned in a 1:1 ratio to an intervention group or a no-intervention control group. The intervention group will perform 60 resisted breaths at 50% of maximal inspiratory pressure using a POWERbreathe device during a sport-specific fixed-ball throwing drill. Both groups will complete assessments before and immediately after the intervention period on the same day. Quadriceps muscle oxygen saturation and total hemoglobin will be measured using a Moxy near-infrared spectroscopy monitor during the Incremental Shuttle Walk Test. Exercise capacity, dynamic balance, and agility will be assessed using the Incremental Shuttle Walk Test, Star Excursion Balance Test, and T-Test, respectively.
Who can participate
Age range
18 Years – 25 Years
Sex
MALE
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Male, aged 18 to 25 years
* Regular participation in volleyball training
* University student actively playing on an elite-level volleyball team
* Regular training during the previous 3 months
* Willing and able to provide written informed consent
Exclusion Criteria:
* Current smoking or regular alcohol use
* Regular use of medication or vitamin supplements
* History of upper respiratory tract infection or COVID-19 within the previous 3 months
* Lower-extremity or shoulder surgery within the previous 6 months
* An acute respiratory or musculoskeletal condition that prevents safe completion of the protocol
* Inability to complete the assessment or training procedures
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Change in Quadriceps Total Hemoglobin During the Incremental Shuttle Walk Test
Timeframe: Baseline and immediately after the single-session intervention or control period, within the same day
2
Change in Quadriceps Muscle Oxygen Saturation During the Incremental Shuttle Walk Test
Timeframe: Baseline and immediately after the single-session intervention or control period, within the same day