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Acute Effects of Functional Inspiratory Muscle Training in Elite Male Volleyball Players

NCT07763002 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 30

Last updated 2026-08-13

No results posted yet for this study

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.

Conditions

  • Athletic Performance

Interventions

DEVICE

Functional Inspiratory Muscle Training With POWERbreathe

A POWERbreathe pressure-threshold inspiratory muscle training device is used during a sport-specific fixed-ball throwing drill after warm-up. Before training, maximal inspiratory pressure is measured using a mouth pressure meter. The device resistance is individualized at 50% of maximal inspiratory pressure. Participants complete two sets of 30 resisted inspirations, totaling 60 breaths, over approximately 10 to 12 minutes. Expiration is unrestricted. The intervention is delivered once.

Sponsors & Collaborators

  • Gazi University

    lead OTHER

Principal Investigators

  • Meral BOŞNAK GÜÇLÜ, PhD · Gazi University

  • Betül Yoleri, MSc · Gazi University

  • Mücahit Şahin, Pt · Gazi University

  • Ece Demirkılınç, Pt · Gazi University

  • İrem Acar, Pt · Gazi University

  • Ebrar Tarhan, Pt · Gazi University

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Max Age
25 Years
Sex
MALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2026-05-01
Primary Completion
2027-05-01
Completion
2027-06-01

Countries

  • Turkey (Türkiye)

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07763002 on ClinicalTrials.gov