Diaphragmatic Facilitation and Upper Extremity Performance in Volleyball Players
25 de agosto de 2026 actualizado por: 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.
Descripción general del estudio
Estado
Reclutamiento
Condiciones
Intervención / Tratamiento
Tipo de estudio
Intervencionista
Inscripción (Estimado)
50
Fase
- No aplica
Contactos y Ubicaciones
Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.
Ubicaciones de estudio
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Istanbul, Turquía (Türkiye), 34010
- Reclutamiento
- Istinye University
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Contacto:
- Kubra Kardes, Asst.Prof
- Número de teléfono: 05387115631
- Correo electrónico: kubrakoce@gmail.com
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Criterios de participación
Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Sí
Descripción
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.
Plan de estudios
Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Doble
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Experimental: 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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Experimental: 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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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Forced Vital Capacity
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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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Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Fechas de registro del estudio
Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.
Fechas importantes del estudio
Inicio del estudio (Estimado)
30 de agosto de 2026
Finalización primaria (Estimado)
15 de noviembre de 2026
Finalización del estudio (Estimado)
30 de noviembre de 2026
Fechas de registro del estudio
Enviado por primera vez
21 de agosto de 2026
Primero enviado que cumplió con los criterios de control de calidad
21 de agosto de 2026
Publicado por primera vez (Actual)
25 de agosto de 2026
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
27 de agosto de 2026
Última actualización enviada que cumplió con los criterios de control de calidad
25 de agosto de 2026
Última verificación
1 de agosto de 2026
Más información
Términos relacionados con este estudio
Palabras clave
Términos MeSH relevantes adicionales
Otros números de identificación del estudio
- 2025/07
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
No
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
No
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