Diaphragmatic Facilitation and Upper Extremity Performance in Volleyball Players
25 agosto 2026 aggiornato da: 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.
Panoramica dello studio
Stato
Reclutamento
Condizioni
Intervento / Trattamento
Tipo di studio
Interventistico
Iscrizione (Stimato)
50
Fase
- Non applicabile
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Luoghi di studio
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Istanbul, Turchia (Türkiye), 34010
- Reclutamento
- Istinye University
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Contatto:
- Kubra Kardes, Asst.Prof
- Numero di telefono: 05387115631
- Email: kubrakoce@gmail.com
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Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
- Adulto
Accetta volontari sani
Sì
Descrizione
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.
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Doppio
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Sperimentale: 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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Sperimentale: 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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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Forced Vital Capacity
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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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Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Sponsor
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio (Stimato)
30 agosto 2026
Completamento primario (Stimato)
15 novembre 2026
Completamento dello studio (Stimato)
30 novembre 2026
Date di iscrizione allo studio
Primo inviato
21 agosto 2026
Primo inviato che soddisfa i criteri di controllo qualità
21 agosto 2026
Primo Inserito (Effettivo)
25 agosto 2026
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
27 agosto 2026
Ultimo aggiornamento inviato che soddisfa i criteri QC
25 agosto 2026
Ultimo verificato
1 agosto 2026
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- 2025/07
Informazioni su farmaci e dispositivi, documenti di studio
Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti
No
Studia un dispositivo regolamentato dalla FDA degli Stati Uniti
No
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .