Flywheel Training Effects on Power and Performance in Youth Olympic Weightlifters (FLY-WL)
28 de maio de 2026 atualizado 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.
Visão geral do estudo
Status
Concluído
Condições
Intervenção / Tratamento
Descrição detalhada
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 estudo
Intervencional
Inscrição (Real)
18
Estágio
- Não aplicável
Contactos e Locais
Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.
Locais de estudo
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Damietta, Egito, 34517
- Damietta University, Faculty of Sports Science
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Critérios de participação
Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.
Critérios de elegibilidade
Idades elegíveis para estudo
- Filho
Aceita Voluntários Saudáveis
Sim
Descrição
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
Plano de estudo
Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: Não randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
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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.
Outros nomes:
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 Ativo: 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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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
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Snatch Performance
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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 resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
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Squat Jump Height
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
Prazo: 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
É aqui que você encontrará pessoas e organizações envolvidas com este estudo.
Patrocinador
Investigadores
- Investigador principal: Ahmed Hassan, PhD, Faculty of Sports Science, Damietta University
Datas de registro do estudo
Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.
Datas Principais do Estudo
Início do estudo (Real)
20 de dezembro de 2025
Conclusão Primária (Real)
27 de fevereiro de 2026
Conclusão do estudo (Real)
27 de fevereiro de 2026
Datas de inscrição no estudo
Enviado pela primeira vez
22 de maio de 2026
Enviado pela primeira vez que atendeu aos critérios de CQ
28 de maio de 2026
Primeira postagem (Real)
3 de junho de 2026
Atualizações de registro de estudo
Última Atualização Postada (Real)
3 de junho de 2026
Última atualização enviada que atendeu aos critérios de controle de qualidade
28 de maio de 2026
Última verificação
1 de maio de 2026
Mais Informações
Termos relacionados a este estudo
Outros números de identificação do estudo
- DU-FLY-2026
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
SIM
Descrição do plano 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.
Prazo de Compartilhamento de IPD
Data will become available after publication of the primary results and will remain accessible for a period of 5 years following publication.
Critérios de acesso de compartilhamento 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 informação de suporte de compartilhamento de IPD
- PROTOCOLO DE ESTUDO
- SEIVA
- CIF
- ANALYTIC_CODE
Dados/documentos do estudo
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Conjunto de dados de participantes individuais
Identificador de informação: OSF Registry: bc4mpComentários informativos: 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.
Informações sobre medicamentos e dispositivos, documentos de estudo
Estuda um medicamento regulamentado pela FDA dos EUA
Não
Estuda um produto de dispositivo regulamentado pela FDA dos EUA
Não
Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .