Flywheel Training Effects on Power and Performance in Youth Olympic Weightlifters (FLY-WL)
28 mai 2026 mis à jour par: 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.
Aperçu de l'étude
Statut
Complété
Les conditions
Intervention / Traitement
Description détaillée
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.
Type d'étude
Interventionnel
Inscription (Réel)
18
Phase
- N'est pas applicable
Contacts et emplacements
Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.
Lieux d'étude
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Damietta, Egypte, 34517
- Damietta University, Faculty of Sports Science
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Critères de participation
Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.
Critère d'éligibilité
Âges éligibles pour étudier
- Enfant
Accepte les volontaires sains
Oui
La description
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 d'étude
Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Non randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
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Expérimental: 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.
Autres noms:
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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Comparateur actif: 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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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Snatch Performance
Délai: 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
Délai: 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
Délai: 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
Délai: 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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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Squat Jump Height
Délai: 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
Délai: 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
Délai: 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
Délai: 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
Délai: 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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Collaborateurs et enquêteurs
C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.
Parrainer
Les enquêteurs
- Chercheur principal: Ahmed Hassan, PhD, Faculty of Sports Science, Damietta University
Dates d'enregistrement des études
Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.
Dates principales de l'étude
Début de l'étude (Réel)
20 décembre 2025
Achèvement primaire (Réel)
27 février 2026
Achèvement de l'étude (Réel)
27 février 2026
Dates d'inscription aux études
Première soumission
22 mai 2026
Première soumission répondant aux critères de contrôle qualité
28 mai 2026
Première publication (Réel)
3 juin 2026
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
3 juin 2026
Dernière mise à jour soumise répondant aux critères de contrôle qualité
28 mai 2026
Dernière vérification
1 mai 2026
Plus d'information
Termes liés à cette étude
Autres numéros d'identification d'étude
- DU-FLY-2026
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
OUI
Description du régime 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.
Délai de partage IPD
Data will become available after publication of the primary results and will remain accessible for a period of 5 years following publication.
Critères d'accès au partage 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.
Type d'informations de prise en charge du partage d'IPD
- PROTOCOLE D'ÉTUDE
- SÈVE
- CIF
- ANALYTIC_CODE
Données/documents d'étude
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Ensemble de données de participant individuel
Identifiant des informations: OSF Registry: bc4mpCommentaires d'informations: 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.
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Non
Étudie un produit d'appareil réglementé par la FDA américaine
Non
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .