Diaphragmatic Facilitation and Upper Extremity Performance in Volleyball Players
25 augustus 2026 bijgewerkt door: Kubra Kardes, Istinye University
Immediate Effects of Diaphragmatic Facilitation on Upper Extremity Performance in Volleyball Players
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.
Studie Overzicht
Toestand
Werving
Conditie
Interventie / Behandeling
Studietype
Ingrijpend
Inschrijving (Geschat)
50
Fase
- Niet toepasbaar
Contacten en locaties
In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.
Studie Locaties
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Istanbul, Turkije (Türkiye), 34010
- Werving
- Istinye University
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Contact:
- Kubra Kardes, Asst.Prof
- Telefoonnummer: 05387115631
- E-mail: kubrakoce@gmail.com
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Deelname Criteria
Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Volwassen
Accepteert gezonde vrijwilligers
Ja
Beschrijving
Inclusion Criteria:
- Aged between 18 and 30 years.
- Regularly participating in volleyball for at least one year.
- Training at least twice per week or actively participating in volleyball at the league or tournament level.
- No history of a serious upper extremity or trunk injury within the previous six months, i-including injuries affecting the shoulder, scapular region, or spine.
- No diagnosed chronic respiratory disease, including asthma, chronic obstructive pulmonary disease, or allergic bronchitis.
- Willing and able to provide written informed consent.
Exclusion Criteria:
- History of surgery involving the upper extremity, spine, or trunk within the previous six months, including shoulder arthroscopy or spinal disc surgery.
- Presence of an active musculoskeletal injury, including tendinopathy, bursitis, or ligament injury.
- Presence of a diagnosed respiratory disease, including asthma, chronic obstructive pulmonary disease, or bronchiectasis.
- Presence of a diagnosed postural or spinal deformity that may affect study assessments, including scoliosis, clinically significant kyphosis, or clinically significant lordosis.
- History of a neurological or cardiovascular disease.
Studie plan
Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Dubbele
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
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Experimenteel: Intervention Group
Diaphragmatic Facilitation Group
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Following a standardized dynamic warm-up, participants in the intervention group will receive a single session of manual resisted diaphragmatic facilitation.
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Experimenteel: Control Group
Sham Control Group
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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.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Forced Vital Capacity
Tijdsspanne: 4 weeks
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Forced vital capacity is the maximum volume of air that a participant can forcibly exhale after taking the deepest possible breath.
It will be measured by spirometry and recorded in liters.
Higher values generally indicate greater ventilatory capacity, whereas lower values may indicate reduced pulmonary capacity or expiratory limitation.
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4 weeks
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Forced Expiratory Volume in One Second
Tijdsspanne: 4 weeks
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Forced expiratory volume in one second is the volume of air that a participant can forcibly exhale during the first second of a forced expiratory maneuver.
It will be measured by spirometry and recorded in liters.
Higher values generally indicate better expiratory airflow, whereas lower values may indicate reduced expiratory airflow.
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4 weeks
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Ratio of Forced Expiratory Volume in One Second to Forced Vital Capacity
Tijdsspanne: 4 weeks
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The ratio of forced expiratory volume in one second to forced vital capacity represents the proportion of the forced vital capacity exhaled during the first second of a forced expiratory maneuver.
It will be calculated from spirometric measurements and reported as a percentage.
Higher values generally indicate a greater proportion of air expelled during the first second, whereas lower values may indicate expiratory airflow limitation.
The results will be interpreted with consideration of age- and sex-appropriate reference values.
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4 weeks
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Maximal Inspiratory Pressure
Tijdsspanne: 4 weeks
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Maximal inspiratory pressure will be used to assess inspiratory muscle strength, primarily reflecting the function of the diaphragm and other inspiratory muscles.
The measurement will be repeated three times, and the highest valid value will be recorded in centimeters of water.
A higher absolute pressure value indicates greater inspiratory muscle strength, whereas a lower absolute pressure value indicates weaker inspiratory muscle strength.
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4 weeks
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Maximal Expiratory Pressure
Tijdsspanne: 4 weeks
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Maximal expiratory pressure will be used to assess expiratory muscle strength, particularly the strength of the abdominal and other expiratory muscles.
The measurement will be repeated three times, and the highest valid value will be recorded in centimeters of water.
A higher pressure value indicates greater expiratory muscle strength, whereas a lower pressure value indicates weaker expiratory muscle strength.
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4 weeks
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Medicine Ball Throw Distance
Tijdsspanne: 4 weeks
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Upper extremity explosive power will be assessed using the Medicine Ball Throw Test.
The participant will sit with the back supported against a wall and the legs extended and will be instructed to throw the medicine ball as far as possible.
Throwing distance will be measured in meters.
A longer distance indicates greater upper extremity explosive power, whereas a shorter distance indicates lower explosive power.
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4 weeks
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Closed Kinetic Chain Upper Extremity Stability Test Score
Tijdsspanne: 4 weeks
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Upper extremity stability, strength, power, and endurance will be assessed using the Closed Kinetic Chain Upper Extremity Stability Test.
The participant will assume a push-up position with the hands placed on two markers positioned 90 centimeters apart.
The participant will alternately move each hand across the body to touch the opposite marker during the specified test period.
The total number of valid touches will be recorded.
A higher number of touches indicates better upper extremity functional performance and stability, whereas a lower number indicates poorer performance.
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4 weeks
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Scapular Muscular Endurance Time
Tijdsspanne: 4 weeks
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The functional endurance of the scapular stabilizing muscles will be assessed using the Scapular Muscular Endurance Test.
An appropriately sized wooden rod will be positioned between the participant's elbows while both scapulae are maintained in a neutral position.
The length of time for which the participant can maintain the standardized test position will be recorded in seconds.
A longer duration indicates greater scapular muscular endurance, whereas a shorter duration indicates lower scapular muscular endurance.
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4 weeks
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Medewerkers en onderzoekers
Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.
Sponsor
Studie record data
Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.
Bestudeer belangrijke data
Studie start (Geschat)
30 augustus 2026
Primaire voltooiing (Geschat)
15 november 2026
Studie voltooiing (Geschat)
30 november 2026
Studieregistratiedata
Eerst ingediend
21 augustus 2026
Eerst ingediend dat voldeed aan de QC-criteria
21 augustus 2026
Eerst geplaatst (Werkelijk)
25 augustus 2026
Updates van studierecords
Laatste update geplaatst (Werkelijk)
27 augustus 2026
Laatste update ingediend die voldeed aan QC-criteria
25 augustus 2026
Laatst geverifieerd
1 augustus 2026
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
Andere studie-ID-nummers
- 2025/07
Informatie over medicijnen en apparaten, studiedocumenten
Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel
Nee
Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct
Nee
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