Effects of Unilateral Compound Training on Lower-Limb Strength Asymmetry and Athletic Performance in Female Handball Players (UCT-HB)
Effects of a Six-Week Unilateral Compound Training Program on Lower-Limb Strength Asymmetry and Athletic Performance in Competitive Female Handball Players: A Randomized Controlled Trial
Studieoversigt
Status
Betingelser
Intervention / Behandling
Detaljeret beskrivelse
emale handball requires repeated sprinting, jumping, rapid changes of direction, and unilateral movements that may contribute to the development of lower-limb strength asymmetries. Such asymmetries have been associated with impaired athletic performance and an increased risk of injury. Although unilateral resistance and plyometric exercises have shown beneficial effects individually, evidence regarding the effectiveness of unilateral compound training in female handball players remains limited.
This randomized controlled trial aimed to evaluate the effects of a six-week unilateral compound training program on lower-limb strength asymmetry, isokinetic knee extensor and flexor strength, hamstring-to-quadriceps ratios, body composition, sprint performance, change-of-direction ability, countermovement jump performance, and single-leg jump performance in competitive female handball players.
Thirty competitive female handball players were randomly assigned to an experimental group or a control group. The experimental group completed unilateral resistance and plyometric exercises three times per week for six weeks in addition to regular handball training, whereas the control group continued regular handball training only. Outcome measures were assessed before and after the intervention using standardized laboratory procedures. The findings of this study are expected to provide evidence regarding the effectiveness of unilateral compound training for reducing lower-limb asymmetry and improving sport-specific performance in female handball athletes.
Undersøgelsestype
Tilmelding (Faktiske)
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Gaziantep, Tyrkiet (Türkiye), 27310
- Gaziantep University, Faculty of Sport Sciences
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Female handball players aged 18-25 years.
- Competing in the Turkish Women's 2nd Handball League.
- Regular participation in team training (4 sessions/week) and official matches.
- Voluntary participation with written informed consent.
Exclusion Criteria:
- Current musculoskeletal injury or pain preventing participation in training.
- History of lower-limb surgery within the previous 12 months.
- Neurological, cardiovascular, or other medical conditions affecting exercise participation.
- Failure to complete the intervention or assessment procedures.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Andet
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
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Eksperimentel: Experimental
Participants received a six-week unilateral compound training program three times per week in addition to their regular handball training.
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Participants in the experimental group completed a supervised unilateral compound training program three times per week for six weeks in addition to their regular handball training.
The intervention consisted of progressive unilateral resistance and plyometric exercises designed to improve lower-limb strength asymmetry, isokinetic muscle strength, neuromuscular performance, sprint performance, change-of-direction ability, and jump performance.
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Ingen indgriben: Control
Participants continued their regular handball training without additional unilateral compound training.
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Lower-Limb Strength Asymmetry
Tidsramme: Baseline and immediately after the 6-week intervention
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Lower-limb strength asymmetry was assessed using isokinetic dynamometry before and after the intervention.
Changes in asymmetry between the dominant and non-dominant lower limbs were compared between the experimental and control groups.
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Baseline and immediately after the 6-week intervention
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Isokinetic Knee Extensor Strength
Tidsramme: Baseline and immediately after the 6-week intervention
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Peak torque of the knee extensor muscles measured using an isokinetic dynamometer before and after the intervention.
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Baseline and immediately after the 6-week intervention
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Isokinetic Knee Flexor Strength
Tidsramme: Baseline and immediately after the 6-week intervention
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Peak torque of the knee flexor muscles measured using an isokinetic dynamometer.
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Baseline and immediately after the 6-week intervention
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Hamstring-to-Quadriceps Ratio
Tidsramme: Baseline and immediately after the 6-week intervention
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Hamstring-to-quadriceps strength ratio calculated from isokinetic knee muscle strength measurements.
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Baseline and immediately after the 6-week intervention
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20-m Sprint Performance
Tidsramme: Baseline and immediately after the 6-week intervention
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Sprint time measured over 20 meters.
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Baseline and immediately after the 6-week intervention
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Change-of-Direction Performance
Tidsramme: Baseline and immediately after the 6-week intervention
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Change-of-direction performance assessed using the agility test employed in the study protocol.
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Baseline and immediately after the 6-week intervention
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Countermovement Jump Height
Tidsramme: Baseline and immediately after the 6-week intervention
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Vertical jump height assessed using the countermovement jump test.
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Baseline and immediately after the 6-week intervention
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Samarbejdspartnere og efterforskere
Sponsor
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Primær færdiggørelse (Faktiske)
Studieafslutning (Faktiske)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Andre undersøgelses-id-numre
- 2025-080 (Turkish Medicines and Medical Devices Agency (TITCK))
Plan for individuelle deltagerdata (IPD)
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