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

28. Mai 2026 aktualisiert von: 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.

Studienübersicht

Status

Abgeschlossen

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

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.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

18

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

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

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Kind

Akzeptiert gesunde Freiwillige

Ja

Beschreibung

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

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Nicht randomisiert
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
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.
Verhalten: Flywheel Inertial Training
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.
Andere Namen:
  • Flywheel resistance training; eccentric overload training
Verhalten: Traditional Weightlifting 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.
Aktiver Komparator: 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.
Verhalten: Traditional Weightlifting 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.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Snatch Performance
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Squat Jump Height
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

New Damietta University Hospital

Ermittler

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

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

20. Dezember 2025

Primärer Abschluss (Tatsächlich)

27. Februar 2026

Studienabschluss (Tatsächlich)

27. Februar 2026

Studienanmeldedaten

Zuerst eingereicht

22. Mai 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

28. Mai 2026

Zuerst gepostet (Tatsächlich)

3. Juni 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

3. Juni 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

28. Mai 2026

Zuletzt verifiziert

1. Mai 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • DU-FLY-2026

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

Beschreibung des IPD-Plans

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.

IPD-Sharing-Zeitrahmen

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

IPD-Sharing-Zugriffskriterien

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.

Art der unterstützenden IPD-Freigabeinformationen

  • STUDIENPROTOKOLL
  • SAFT
  • ICF
  • ANALYTIC_CODE

Studiendaten/Dokumente

  1. Einzelner Teilnehmerdatensatz
    Informationskennung: OSF Registry: bc4mp
    Informationskommentare: 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.

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Diese Informationen wurden ohne Änderungen direkt von der Website clinicaltrials.gov abgerufen. Wenn Sie Ihre Studiendaten ändern, entfernen oder aktualisieren möchten, wenden Sie sich bitte an register@clinicaltrials.gov. Sobald eine Änderung auf clinicaltrials.gov implementiert wird, wird diese automatisch auch auf unserer Website aktualisiert .

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