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Effects of Taekwondo Match-Simulated Fatigue on Balance Performance in Female Athletes

14 de septiembre de 2026 actualizado por: Berkay Löklüoğlu

Effects of Taekwondo Match-Simulated Fatigue on Static and Dynamic Balance Performance in Female Athletes

Taekwondo is a high-intensity combat sport characterized by repeated explosive kicking actions and rapid changes in body position, requiring well-developed postural control to maintain technical performance and reduce injury risk. Although fatigue has been reported to impair balance performance, previous studies have primarily induced fatigue using non-specific laboratory protocols that do not adequately reflect the physiological and neuromuscular demands of taekwondo competition. Consequently, the effects of taekwondo-specific fatigue on static and dynamic balance performance remain insufficiently understood. The primary objective of this study will be to investigate the effects of a taekwondo match-simulated fatigue protocol on static and dynamic balance performance in female taekwondo athletes. Eighteen competitive female taekwondo athletes will participate in this single-group repeated-measures study. Following a familiarization session, participants will complete a standardized taekwondo match-simulated fatigue protocol consisting of three 2-minute rounds separated by 1-minute passive recovery periods, replicating the official Olympic competition format. Static and dynamic balance performance will be assessed before and immediately after the fatigue protocol using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Balance performance will be evaluated under static and dynamic testing conditions, and the Overall Stability Index, Anteroposterior Stability Index, and Mediolateral Stability Index will be recorded. The findings of this study are expected to improve understanding of the acute effects of sport-specific fatigue on postural control in female taekwondo athletes and may contribute to the development of evidence-based training and injury prevention strategies.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Tipo de estudio

Intervencionista

Inscripción (Actual)

20

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.

Estudio Contacto

  • Nombre: Berkay Löklüoğlu, Dr.
  • Número de teléfono: +905543076212
  • Correo electrónico: berkayl@hotmail.com

Ubicaciones de estudio

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:

  • Female taekwondo athletes aged 18-20 years.
  • Regular participation in taekwondo training (minimum 3 sessions per week).
  • Minimum of 3 years of competitive taekwondo experience.
  • Free from musculoskeletal injury at the time of testing.
  • Willingness to provide written informed consent

Exclusion Criteria:

  • Any musculoskeletal injury within the previous 6 months.
  • Neurological, vestibular, or balance disorders.
  • Lower-extremity surgery within the previous 12 months.
  • Any medical condition preventing participation in maximal exercise.
  • Failure to complete the testing protocol

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: Ciencia básica
  • Asignación: N / A
  • Modelo Intervencionista: Asignación de un solo grupo
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: Experimental research design
Female taekwondo athletes will complete a standardized taekwondo match-simulated fatigue protocol. Static and dynamic balance performance will be assessed immediately before and after the fatigue protocol during a single experimental session.
Participants will perform a standardized taekwondo match-simulated fatigue protocol designed to reproduce the physiological and neuromuscular demands of an official taekwondo match. Static and dynamic balance performance will be evaluated immediately before and after completion of the protocol.
Static balance performance will be assessed using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Mean Overall Stability Index (OSI) score, mean Anteroposterior Stability Index (APSI) score, and mean Mediolateral Stability Index (MLSI) score will be calculated automatically by the system. The static balance condition will be combined with an eyes-closed stance with the platform locked at a static level (a fixed support); this condition will designed to reflect support-fixed, vision-deprived postural control, where the participant must maintain postural stability without visual cues on a stable surface.
Dynamic balance performance will be assessed using the Biodex Balance System (Biodex Medical Systems Inc., Shirley, NY, USA). Mean Overall Stability Index (OSI) score, mean Anteroposterior Stability Index (APSI) score, and mean Mediolateral Stability Index (MLSI) score will be calculated automatically by the system. The dynamic balance condition combines an eyes-open stance with the platform stability set to level 5 (an unstable platform that requires active postural adjustments). This condition will be designed to reflect visually guided, mechanically unstable postural control, where the participant must rely on real-time visual feedback to compensate for continuous platform tilt.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Mean Overall Stability Index (OSI) Score
Periodo de tiempo: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
The Mean Overall Stability Index Score is the arithmetic mean of Overall Stability Index values automatically calculated by the Biodex system at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about both the anteroposterior and mediolateral axes combined; it reflects composite postural sway during the trial. Each participant completed the trial barefoot on her dominant lower extremity, under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). The index is a unitless score representing the standard deviation of platform tilt about the corresponding axis; the theoretical minimum score is 0, which represents perfect postural stability. There is no fixed theoretical upper limit of these indices. Higher scores indicate poorer balance performance.
Baseline and immediately after the taekwondo match-simulated fatigue protocol.
Mean Mediolateral Stability Index (MLSI) Score
Periodo de tiempo: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
The Mean Mediolateral Stability Index Score is the arithmetic mean of Mediolateral Stability Index values automatically calculated by the Biodex Balance System at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about the frontal axis only; it reflects mediolateral sway and is associated with hip-abductor-driven postural control. Each participant will complete the trial barefoot on her dominant lower extremity (the foot preferred for kicking a ball) under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). Theoretically, this index has a minimum value of 0, which represents perfect postural stability; there is no fixed theoretical upper limit. Higher scores indicate poorer balance performance.
Baseline and immediately after the taekwondo match-simulated fatigue protocol.
Mean Anterior-Posterior Stability Index (APSI) Score
Periodo de tiempo: Baseline and immediately after the taekwondo match-simulated fatigue protocol.
The Mean Anterior-Posterior Stability Index Score is the arithmetic mean of Anterior-Posterior Stability Index values automatically calculated by the Biodex system at the end of each 20-second single-leg stance trial. This index is a unitless score representing the standard deviation of platform tilt about the sagittal axis only; it reflects anteroposterior sway and is associated with the ankle strategy of postural control. Each participant will complete the trial barefoot on her dominant lower extremity (the foot preferred for kicking a ball) under two within-subject conditions: (i) dynamic balance (eyes-open stance with the Biodex platform stability set to level 5), and (ii) static balance (eyes-closed stance with the platform locked at a static level). Theoretically, this index has a minimum value of 0, which represents perfect postural stability; there is no fixed theoretical upper limit. Higher scores indicate poorer balance performance.
Baseline and immediately after the taekwondo match-simulated fatigue protocol.

Medidas de resultado secundarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Mean Age
Periodo de tiempo: Only baseline.
The mean chronological age of participants at the time of enrollment will be reported in years. Age will be derived from each participant's official identification date of birth and the calendar date of the first balance testing session. It will be used solely as a descriptive baseline demographic variable.
Only baseline.
Mean Body Mass Index
Periodo de tiempo: Only baseline.
Mean Body Mass Index is the arithmetic mean of participant-level BMI values aggregated from body mass (kg) and height (m) according to the standard formula BMI = body mass (kg) / height² (m²). Body mass will be measured in kilograms and standing height in centimeters by a single trained experimenter during the enrollment session. Each participant-level BMI is therefore a single aggregated value derived from two distinct unit-of-measure measurements; height (centimeters) and body mass (kilograms) are not reported separately. It will be used solely as a descriptive baseline demographic variable.
Only baseline.

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 (Actual)

1 de junio de 2026

Finalización primaria (Actual)

1 de julio de 2026

Finalización del estudio (Actual)

1 de agosto de 2026

Fechas de registro del estudio

Enviado por primera vez

25 de julio de 2026

Primero enviado que cumplió con los criterios de control de calidad

30 de julio de 2026

Publicado por primera vez (Actual)

5 de agosto de 2026

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

17 de septiembre de 2026

Última actualización enviada que cumplió con los criterios de control de calidad

14 de septiembre de 2026

Última verificación

1 de agosto de 2026

Más información

Términos relacionados con este estudio

Otros números de identificación del estudio

  • 279

Plan de datos de participantes individuales (IPD)

¿Planea compartir datos de participantes individuales (IPD)?

NO

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

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .