Flywheel Training Effects on Power and Performance in Youth Olympic Weightlifters (FLY-WL)
28 de mayo de 2026 actualizado por: Ahmed Awad Ahmed Hassan, New Damietta University Hospital
Effects of Flywheel Inertial Training on Lower-Limb Power, Trunk Stability, and Olympic Weightlifting Performance in Youth Athletes
This study investigated the effects of flywheel inertial training on lower-limb power, trunk stability, and Olympic weightlifting performance in youth athletes.
Eighteen youth Olympic weightlifters were allocated to a flywheel training group or a control group.
Both groups continued their regular weightlifting training over a 10-week intervention period.
The experimental group performed additional flywheel-based exercises twice weekly.
Outcomes included measures of lower-limb power, trunk inclination during lifting, weightlifting performance, and technical error frequency.
Descripción general del estudio
Estado
Terminado
Condiciones
Intervención / Tratamiento
Descripción detallada
This study investigated the effects of flywheel inertial training on lower-limb power, trunk stability, and Olympic weightlifting performance in youth athletes. Flywheel training is an eccentric-overload method that has been suggested to enhance neuromuscular adaptations, particularly in power and movement control. Eighteen youth Olympic weightlifters participated in this controlled intervention study and were allocated into a flywheel training group and a control group.
Both groups continued their regular Olympic weightlifting training program, which included technical practice of the snatch and clean, strength exercises, and general physical preparation. The experimental group additionally performed flywheel-based exercises twice per week over a 10-week training period. The intervention was progressively structured to ensure appropriate load adaptation and technical execution.
Outcome measures included assessments of lower-limb power, trunk inclination during lifting positions, performance in the snatch and clean, and technical error frequency. Pre- and post-intervention comparisons were used to evaluate the effects of the training program.
Tipo de estudio
Intervencionista
Inscripción (Actual)
18
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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Damietta, Egipto, 34517
- Damietta University, Faculty of Sports Science
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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
- Niño
Acepta Voluntarios Saludables
Sí
Descripción
Inclusion Criteria:
- Male youth Olympic weightlifters aged 13-17 years
- Actively participating in structured Olympic weightlifting training
- Technical ability to perform snatch and clean lifts
- Free from musculoskeletal injury at the time of participation
- Medically fit for resistance training and high-intensity exercise
Exclusion Criteria:
- Presence of injury limiting participation in training or testing
- Absence rate greater than 20% of training or intervention sessions
- Participation in additional structured lower-limb eccentric or flywheel training outside the study program
- Any medical condition contraindicating resistance training
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: No aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Ninguno (etiqueta abierta)
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Experimental: Flywheel Inertial Training Group
Participants in this group performed their regular Olympic weightlifting training program combined with additional flywheel inertial training twice per week for 10 weeks.
The flywheel training included lower-limb and trunk exercises such as squats, split squats, Romanian deadlifts, pulling variations, and anti-rotation core exercises.
The training was progressively structured to ensure appropriate eccentric overload and technical control.
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Flywheel inertial training was performed twice weekly for 10 weeks in addition to regular Olympic weightlifting training.
The program included lower-limb and trunk exercises such as squats, split squats, Romanian deadlifts, pulling variations, and core stabilization exercises.
The training emphasized eccentric overload and progressive resistance to enhance power production and movement control.
Otros nombres:
Participants performed conventional Olympic weightlifting training including snatch and clean and jerk technique practice, squats, pulling exercises, strength exercises, mobility exercises, and general physical preparation according to the regular training program.
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Comparador activo: Control Group (Traditional Weightlifting Training)
Participants in this group continued their regular Olympic weightlifting training program only, which included snatch and clean technique practice, strength exercises, pulling derivatives, squats, mobility work, and general physical preparation, without any additional flywheel training.
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Participants performed conventional Olympic weightlifting training including snatch and clean and jerk technique practice, squats, pulling exercises, strength exercises, mobility exercises, and general physical preparation according to the regular training program.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Snatch Performance
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Snatch performance was assessed as the best successful snatch lift completed by each participant according to technical criteria.
The unit of measurement was kilograms (kg).
The outcome was analyzed as the change in kilograms from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Clean Lift Performance
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Clean lift performance was assessed as the best successful clean lift completed by each participant without performing the jerk phase.
The unit of measurement was kilograms (kg).
The outcome was analyzed as the change in kilograms from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Countermovement Jump Height
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Countermovement jump height was measured to assess lower-limb explosive power.
The unit of measurement was centimeters (cm).
The outcome was analyzed as the change in centimeters from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Trunk Inclination Angle During Snatch Receiving Position
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Trunk inclination angle was measured during the lowest stable snatch receiving position using video-based kinematic analysis.
The angle was measured from the vertical reference line passing through the hip joint.
The unit of measurement was degrees (°).
The outcome was analyzed as the change in degrees from baseline to 10 weeks.
A lower angle indicates a more upright trunk position.
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Baseline and 10 weeks post-intervention
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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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Squat Jump Height
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Squat jump height was measured to assess concentric lower-limb power.
The unit of measurement was centimeters (cm).
The outcome was analyzed as the change in centimeters from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Standing Long Jump Distance
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Standing long jump distance was measured to assess horizontal lower-limb explosive power.
The unit of measurement was centimeters (cm).
The outcome was analyzed as the change in centimeters from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Trunk Inclination Angle During Clean Receiving Position
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Trunk inclination angle was measured during the lowest stable clean receiving position using video-based kinematic analysis.
The angle was measured from the vertical reference line passing through the hip joint.
The unit of measurement was degrees (°).
The outcome was analyzed as the change in degrees from baseline to 10 weeks.
A lower angle indicates a more upright trunk position.
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Baseline and 10 weeks post-intervention
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Total Weightlifting Performance
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Total weightlifting performance was calculated as the sum of the best successful snatch lift and the best successful clean lift without jerk.
The unit of measurement was kilograms (kg).
The outcome was analyzed as the change in kilograms from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Technical Error Frequency During Snatch and Clean Attempts
Periodo de tiempo: Baseline and 10 weeks post-intervention
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Technical-error frequency was calculated from video analysis by counting the total number of observed technical errors during selected snatch and clean attempts.
The coded errors included excessive trunk inclination, forward or backward jump during receiving, unstable receiving position, loss of balance during recovery, and visible bar path deviation.
The unit of measurement was number of errors.
The outcome was analyzed as the change in number of errors from baseline to 10 weeks.
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Baseline and 10 weeks post-intervention
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Colaboradores e Investigadores
Aquí es donde encontrará personas y organizaciones involucradas en este estudio.
Patrocinador
Investigadores
- Investigador principal: Ahmed Hassan, PhD, Faculty of Sports Science, Damietta University
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)
20 de diciembre de 2025
Finalización primaria (Actual)
27 de febrero de 2026
Finalización del estudio (Actual)
27 de febrero de 2026
Fechas de registro del estudio
Enviado por primera vez
22 de mayo de 2026
Primero enviado que cumplió con los criterios de control de calidad
28 de mayo de 2026
Publicado por primera vez (Actual)
3 de junio de 2026
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
3 de junio de 2026
Última actualización enviada que cumplió con los criterios de control de calidad
28 de mayo de 2026
Última verificación
1 de mayo de 2026
Más información
Términos relacionados con este estudio
Otros números de identificación del estudio
- DU-FLY-2026
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
SÍ
Descripción del plan IPD
Individual participant data (IPD) collected in this study will include anthropometric data, performance measures (snatch, clean, jump tests), trunk kinematic variables, and technical error scores.
De-identified data will be shared with qualified researchers upon reasonable request for secondary analysis.
Marco de tiempo para compartir IPD
Data will become available after publication of the primary results and will remain accessible for a period of 5 years following publication.
Criterios de acceso compartido de IPD
Access to the de-identified dataset will be granted upon reasonable request to the principal investigator.
Requests must include a brief research proposal and will be evaluated for scientific merit and ethical compliance.
Tipo de información de apoyo para compartir IPD
- PROTOCOLO DE ESTUDIO
- SAVIA
- CIF
- CÓDIGO_ANALÍTICO
Datos del estudio/Documentos
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Conjunto de datos de participantes individuales
Identificador de información: OSF Registry: bc4mpComentarios de información: De-identified individual participant data (IPD) will be available upon reasonable request to the principal investigator after publication. Access is restricted to academic research purposes and subject to ethical approval where required. Supporting materials including study protocol, statistical analysis plan, and analytic code are available via the Open Science Framework (OSF) registry.
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. .