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Diaphragmatic Facilitation and Upper Extremity Performance in Volleyball Players
Sponsor: Istinye University
Summary
The diaphragm contributes to both respiration and trunk stabilization. Effective diaphragmatic function may support postural control, force transfer, and upper extremity performance during dynamic activities. However, evidence regarding the immediate effects of manual diaphragmatic facilitation on upper extremity performance in athletes remains limited. This study aims to investigate the immediate effects of manual diaphragmatic facilitation on upper extremity performance and respiratory function in actively participating volleyball players. Participants will receive an approximately 15-minute session of manual diaphragmatic facilitation. Pulmonary function, respiratory muscle strength, and upper extremity strength, stability, and endurance will be assessed immediately before and after the intervention. Assessments will include spirometry, maximal inspiratory and expiratory pressures, the Medicine Ball Throw Test, the Closed Kinetic Chain Upper Extremity Stability Test, and the Scapular Endurance Test.
Official title: Immediate Effects of Diaphragmatic Facilitation on Upper Extremity Performance in Volleyball Players
Key Details
Gender
All
Age Range
18 Years - 30 Years
Study Type
INTERVENTIONAL
Enrollment
50
Start Date
2026-08-30
Completion Date
2026-11-30
Last Updated
2026-08-25
Healthy Volunteers
Yes
Conditions
Interventions
Diaphragmatic Facilitation
Following a standardized dynamic warm-up, participants in the intervention group will receive a single session of manual resisted diaphragmatic facilitation.
Sham Facilitation
Participants in the control group will complete the same dynamic warm-up protocol, followed by a sham intervention consisting of superficial, non-facilitatory palpation and general breathing instructions.
Locations (1)
Istinye University
Istanbul, Turkey (Türkiye)