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.

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

Adolescent Volleyball Players consist of research group.