Flywheel vs Traditional Resistance Training for Change of Direction in Elite Soccer Players (UFRT-COD)
The Effects of Unilateral Flywheel Training and Traditional Resistance Training on Change-of-Direction Performance in Elite Soccer Players: A Randomized Controlled Trial
The purpose of this randomized controlled trial is to compare the effects of unilateral flywheel resistance training and unilateral traditional resistance training on change-of-direction performance in elite male soccer players.
A total of 22 elite soccer players will be randomly assigned to either a flywheel resistance training group or a traditional resistance training group. Both groups will perform supervised training twice per week for 8 weeks in addition to their regular soccer training.
Performance outcomes will include linear sprint tests (10 m and 30 m), pre-planned change-of-direction tests (Pro-agility, T-test, Arrowhead test), and agility tests under no-ball and with-ball conditions (AFL agility test).
The primary outcome is change-of-direction performance assessed by the T-test. Secondary outcomes include direction-specific change-of-direction ability and agility performance.
It is hypothesized that unilateral flywheel resistance training will produce greater improvements in change-of-direction performance compared with traditional resistance training, particularly in tasks involving braking and re-acceleration.
Descripción general del estudio
Estado
Condiciones
Intervención / Tratamiento
Descripción detallada
This study is an exploratory randomized controlled trial designed to investigate the effects of unilateral flywheel resistance training (FRT) compared with unilateral traditional resistance training (TRT) on change-of-direction (COD) performance in elite male soccer players.
Participants are highly trained soccer athletes with at least 8 years of training experience and no recent lower-limb injuries. Following baseline testing, participants are randomly allocated in a 1:1 ratio to either the FRT group or the TRT group.
Both groups perform an 8-week training intervention consisting of two supervised sessions per week. The training exercise is the unilateral Bulgarian split squat, performed with either flywheel inertial resistance (FRT) or barbell loading (TRT). Training volume, frequency, and movement pattern are matched between groups. Load prescription is standardized using mean concentric velocity matching.
Outcome measures are assessed before and after the intervention and include:
- Linear sprint performance (10 m and 30 m)
- Pre-planned change-of-direction performance (Pro-agility test, T-test)
- Direction-specific COD performance (Arrowhead test left and right)
- Agility performance under no-ball and ball conditions (AFL agility test) The primary outcome is T-test performance. Secondary outcomes include Pro-agility, Arrowhead, and AFL agility tests. Exploratory outcomes include linear sprint performance and ball-constrained agility.
The study aims to determine whether eccentric overload provided by flywheel training leads to superior improvements in COD performance compared with traditional resistance training under matched movement conditions.
Tipo de estudio
Inscripción (Actual)
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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Beijing, Porcelana, 100084
- Beijing Sport University
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
- Adulto
Acepta Voluntarios Saludables
Descripción
Inclusion Criteria:
- Male elite or sub-elite soccer players aged 18-25 years
- Minimum of 3 years of structured soccer training experience
- Currently participating in regular team training (≥3 sessions per week)
- Free from musculoskeletal injury within the past 3 months
- No prior experience with flywheel resistance training
- Provided written informed consent to participate
Exclusion Criteria:
- History of lower-limb surgery within the past 6 months
- Current musculoskeletal pain or injury affecting performance
- Neurological or cardiovascular conditions contraindicating high-intensity exercise
- Participation in additional strength or conditioning programs outside the study
- Inability to complete the full intervention protocol
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Ciencia básica
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Único
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
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Experimental: Flywheel Resistance Training
Participants perform unilateral flywheel resistance training using a Bulgarian split squat exercise twice per week for 8 weeks in addition to regular soccer training.
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Unilateral flywheel resistance training was performed using a Bulgarian split squat exercise on a flywheel device.
Participants completed 2 training sessions per week for 8 weeks.
Each session consisted of 4 sets of 6 repetitions per leg.
The inertial load was individually selected based on mean concentric velocity matching.
Participants were instructed to perform the concentric phase explosively and the eccentric phase with maximal braking effort.
Otros nombres:
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Comparador activo: Traditional Resistance Training
Participants perform unilateral traditional resistance training using a barbell Bulgarian split squat exercise twice per week for 8 weeks in addition to regular soccer training.
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Unilateral traditional resistance training was performed using a barbell Bulgarian split squat exercise.
Participants trained twice per week for 8 weeks.
Each session consisted of 4 sets of 6 repetitions per leg at approximately 80% of one-repetition maximum.
Movement tempo was controlled with an explosive concentric phase and a controlled eccentric phase.
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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
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T-test performance (change in completion time, seconds)
Periodo de tiempo: Baseline and Week 8
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Change in T-test completion time (seconds) from baseline to post-intervention after 8 weeks of training.
The T-test assesses multidirectional change-of-direction ability involving forward sprinting, lateral shuffling, and backward running.
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Baseline and Week 8
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Colaboradores e Investigadores
Patrocinador
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Otros números de identificación del estudio
- BSU2025611H-FRTCOD
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Descripción del plan IPD
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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