An observational study in Adolescent Behavior and Athletic Injuries, sponsored by Izmir Democracy University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 10 Years to 19 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-07-27.
Sponsored by Izmir Democracy University · Observational
A volleyball player with high respiratory muscle endurance can perform at a high level of efficiency during competitions without experiencing fatigue. However, no study has been found in the literature examining respiratory muscle strength, respiratory muscle endurance, cough strength and balance parameters in adolescent volleyball players which was therefore aimed to investigate the potential relationship between these parameters in this study.
Professional sports performance in adolescent volleyball players who have not yet completed their developmental period may be affected in terms of respiratory muscle strength and endurance, cough strength and balance. However, no study has been found in the literature investigating the relationship between respiratory muscle strength, respiratory muscle endurance, cough strength and balance in adolescent volleyball players and these parameters. Therefore, the aim of our study is to determine the relationship between respiratory muscle strength, respiratory muscle endurance, cough strength and balance in adolescent volleyball players.
305 studies on the registry are indexed under Adolescent Behavior; 47 are open to participants now.
This study's enrollment of 18 is below the median of 247 across 40 observational studies indexed under Adolescent Behavior.
Browse Adolescent Behavior studies →Izmir Democracy University is the lead sponsor of 78 studies on the registry; 32 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Adolescent Volleyball Players consist of research group.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
The group consists of volleyball players who have been actively playing volleyball for at least 1 year and between the ages of 10 and 19
Other: Physical Evaluations in Players
Respiratory muscle strength, respiratory muscle endurance, cough strength or balance will be evaluated in adolescent volleyball players.
Respiratory muscle strength assessment
Respiratory muscle strength will be measured using a portable spirometer. The pressure will be recorded during a few seconds of maximal inspiration (Müller maneuver) or expiration (Valsalva maneuver) through the mouth.The high value obtained indicates good muscle strength.
Time frame: through study completion, an average of 1 year
Respiratory muscle endurance assessment
The respiratory muscle endurance test at increasing threshold load will be measured using POWERbreathe Wellness® Classic Light Resistance device. If the volleyball player cannot continue the test for 10 minutes, the last pressure value at which he can continue ventilation for 2 minutes will be recorded as the respiratory muscle endurance value. Being able to sustain the test for a long time indicates good respiratory muscle endurance.
Time frame: through study completion, an average of 1 year
Evaluation of Cough Strength
The volleyball player's peak cough expiratory flow value will be evaluated using a peak flow meter. The best of at least three repetitions will be recorded. The highest value indicates good cough strength.
Time frame: through study completion, an average of 1 year
Balance Assessment
Balance will be assessed using the Functional Reach Test (FUT). Volleyball players will reach forward from the waist to the wall. The highest reach value will be recorded.The highest value indicates good balance.
Time frame: through study completion, an average of 1 year
Plan to share: No
This study is completed, as verified in Jul 2026. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Izmir Democracy University