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Flywheel Training Effects on Power and Performance in Youth Olympic Weightlifters (FLY-WL)

28. května 2026 aktualizováno: 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.

Přehled studie

Postavení

Dokončeno

Podmínky

Intervence / Léčba

Detailní popis

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.

Typ studie

Intervenční

Zápis (Aktuální)

18

Fáze

  • Nelze použít

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní místa

      • Damietta, Egypt, 34517
        • Damietta University, Faculty of Sports Science

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

  • Dítě

Přijímá zdravé dobrovolníky

Ano

Popis

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

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Léčba
  • Přidělení: Nerandomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Žádné (otevřený štítek)

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: 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.
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.
Ostatní jména:
  • Flywheel resistance training; eccentric overload training
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.
Aktivní komparátor: 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.
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.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Snatch Performance
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Clean Lift Performance
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Countermovement Jump Height
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Trunk Inclination Angle During Snatch Receiving Position
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Squat Jump Height
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Standing Long Jump Distance
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Trunk Inclination Angle During Clean Receiving Position
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Total Weightlifting Performance
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention
Technical Error Frequency During Snatch and Clean Attempts
Časové okno: Baseline and 10 weeks post-intervention
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.
Baseline and 10 weeks post-intervention

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Vyšetřovatelé

  • Vrchní vyšetřovatel: Ahmed Hassan, PhD, Faculty of Sports Science, Damietta University

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Aktuální)

20. prosince 2025

Primární dokončení (Aktuální)

27. února 2026

Dokončení studie (Aktuální)

27. února 2026

Termíny zápisu do studia

První předloženo

22. května 2026

První předloženo, které splnilo kritéria kontroly kvality

28. května 2026

První zveřejněno (Aktuální)

3. června 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

3. června 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

28. května 2026

Naposledy ověřeno

1. května 2026

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • DU-FLY-2026

Plán pro data jednotlivých účastníků (IPD)

Plánujete sdílet data jednotlivých účastníků (IPD)?

ANO

Popis plánu 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.

Časový rámec sdílení IPD

Data will become available after publication of the primary results and will remain accessible for a period of 5 years following publication.

Kritéria přístupu pro sdílení 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.

Typ podpůrných informací pro sdílení IPD

  • PROTOKOL STUDY
  • MÍZA
  • ICF
  • ANALYTIC_CODE

Studijní data/dokumenty

  1. Soubor dat jednotlivých účastníků
    Identifikátor informace: OSF Registry: bc4mp
    Komentáře k informacím: 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.

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ne

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

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