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Completed

NCT Number: NCT06979349

Respiration and Balance in Adolescent Volleyball Players

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.

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Key information

Conditions

Adolescent Behavior Athletic Injuries Behavior Cough Pathological Conditions, Signs and Symptoms Respiration Disorders Respiratory Tract Diseases Signs and Symptoms Signs and Symptoms, Respiratory Wounds and Injuries

Age range

10 year–19 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Izmir Democracy University

Konak, İ̇zmi̇r, 35140, Turkey (Türkiye)

About 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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Being between the ages of 10-19
  • Being actively involved in volleyball for at least 1 year
  • Voluntarily agreeing to participate in the study
  • Volleyball player's parent approving participation in the study

Exclusion criteria

  • Have been admitted to hospital with a musculoskeletal injury in the last 3 months
  • Have any known neurological, orthopedic, rheumatic, and/or cardiovascular disease
  • Have been involved in a sport other than volleyball for at least 1 year

Treatment and study plan

Physical Evaluations in Players

Other

Respiratory muscle strength, respiratory muscle endurance, cough strength or balance will be evaluated in adolescent volleyball players.

Primary outcomes

  1. Respiratory muscle strength assessment

    Time frame: through study completion, an average of 1 year

    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.

Secondary outcomes

  1. Respiratory muscle endurance assessment

    Time frame: through study completion, an average of 1 year

    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.

  2. Evaluation of Cough Strength

    Time frame: through study completion, an average of 1 year

    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.

  3. Balance Assessment

    Time frame: through study completion, an average of 1 year

    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.

Sponsors and collaborators

Lead sponsor

Izmir Democracy University

Other

Registry information

Official study title

Respiratory Muscle Strength, Respiratory Muscle Endurance, Cough Strength and Balance in Adolescent Volleyball Players

Important dates

Study start
2024
Primary completion
2026
Study completion
2026
First posted
May 18, 2025
Registry last updated
Jul 27, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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