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Nordic vs Blood Flow Restriction Nordic Exercise in Elite Female Pole Vaulters
Effects of Nordic Hamstring Exercise and Blood Flow Restriction-Assisted Nordic Hamstring Exercise on Hamstring Strength, Muscle Morphology and Functional Performance in Elite Adolescent Female Pole Vaulters: A Randomized Controlled Trial
Studie Overzicht
Toestand
Gedetailleerde beschrijving
Hamstring muscles play a crucial role in sprinting, acceleration, deceleration, and explosive athletic performance. Nordic Hamstring Exercise is widely recommended for increasing eccentric hamstring strength and reducing injury risk. However, evidence regarding the additional effects of blood flow restriction during Nordic Hamstring Exercise is limited, particularly in elite adolescent female athletes.
This randomized controlled trial aims to investigate whether adding blood flow restriction to Nordic Hamstring Exercise enhances adaptations in hamstring muscle strength, muscle morphology, and functional performance compared with conventional Nordic Hamstring Exercise and routine training alone.
Thirty-six elite adolescent female pole vaulters aged 12-18 years will be recruited from the Turkish Olympic Preparation Center. Participants will be allocated using block randomization into three groups:
Nordic Hamstring Exercise Group Blood Flow Restriction Nordic Hamstring Exercise Group Control Group Intervention groups will perform supervised exercise sessions three times weekly for eight weeks. The control group will continue regular training activities without additional hamstring-specific intervention.
Assessments will include hamstring muscle strength measured with a MicroFET2 handheld dynamometer, muscle morphology assessed using ultrasonography, and functional performance evaluated using a 30-meter sprint test.
Studietype
Inschrijving (Geschat)
Fase
- Niet toepasbaar
Contacten en locaties
Studiecontact
- Naam: İdil Esin Ünlü, Assist. Prof. Dr.
- Telefoonnummer: +90 506 515 66 22
- E-mail: idil.unlu@toros.edu.tr
Studie Locaties
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Adana, Turkije (Türkiye)
- Werving
- Adana Olympic Preparation Center
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Contact:
- Burçin Uğur, PHD
- Telefoonnummer: +90 507 772 17 72
- E-mail: burcnugur@yahoo.com
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
- Kind
- Volwassen
Accepteert gezonde vrijwilligers
Beschrijving
Inclusion Criteria:
- Female athletes aged between 12 and 18 years.
- Elite pole vault athletes actively participating in organized training and competition.
- Minimum of 1 year of regular pole vault training experience.
- Participation in regular training at least 3 times per week.
- Ability to participate in an 8-week exercise program.
- Written informed assent from the athlete and written informed consent from a parent or legal guardian.
Exclusion Criteria:
- Any lower extremity musculoskeletal injury within the previous 6 months.
- Previous hamstring muscle surgery.
- Current pain or injury limiting sports participation.
- Neurological disorders affecting movement or balance.
- Cardiovascular conditions contraindicating exercise training or blood flow restriction.
- Any contraindication to blood flow restriction training.
- Participation in another structured hamstring strengthening program during the study period.
- Inability or unwillingness to comply with study procedures.
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Ander
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Geen (open label)
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Experimenteel: Nordic Hamstring Exercise
Participants will perform a supervised Nordic Hamstring Exercise program three times per week for 8 weeks in addition to their routine pole vault training.
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Participants will perform a supervised Nordic Hamstring Exercise program three times per week for 8 weeks in addition to their routine pole vault training.
The exercise program will be progressively increased according to participant tolerance and training progression.
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Experimenteel: Blood Flow Restriction-Assisted Nordic Hamstring Exercise
Participants will perform Nordic Hamstring Exercise combined with blood flow restriction training three times per week for 8 weeks in addition to their routine pole vault training.
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articipants will perform a supervised Nordic Hamstring Exercise program combined with individualized blood flow restriction training three times per week for 8 weeks in addition to their routine pole vault training.
Blood flow restriction will be applied using pneumatic cuffs at a predetermined percentage of arterial occlusion pressure.
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Geen tussenkomst: Control
Participants will continue their routine sports training without additional hamstring-specific exercise intervention.
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Hamstring Muscle Strength
Tijdsspanne: Baseline and 8 weeks
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Isometric hamstring muscle strength will be assessed bilaterally using a MicroFET2 handheld dynamometer.
Three measurements will be recorded and the average value will be used for analysis.
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Baseline and 8 weeks
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Hamstring Muscle Thickness
Tijdsspanne: Baseline and 8 weeks
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Hamstring muscle thickness will be evaluated bilaterally using ultrasonography.
Three measurements will be obtained and averaged.
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Baseline and 8 weeks
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Hamstring Cross-Sectional Area
Tijdsspanne: Baseline and 8 weeks
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Cross-sectional area of the hamstring muscle will be assessed bilaterally using ultrasonography.
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Baseline and 8 weeks
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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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30-Meter Sprint Performance
Tijdsspanne: Baseline and 8 weeks
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Sprint performance will be assessed using a 30-meter sprint test.
The average of three trials will be used for analysis.
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Baseline and 8 weeks
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Medewerkers en onderzoekers
Sponsor
Publicaties en nuttige links
Algemene publicaties
- Ripley NJ, Cuthbert M, Comfort P, McMahon JJ. Effect of additional Nordic hamstring exercise or sprint training on the modifiable risk factors of hamstring strain injuries and performance. PLoS One. 2023 Mar 2;18(3):e0281966. doi: 10.1371/journal.pone.0281966. eCollection 2023.
- Vianna KB, Rodrigues LG, Oliveira NT, Ribeiro-Alvares JB, Baroni BM. A Preseason Training Program With the Nordic Hamstring Exercise Increases Eccentric Knee Flexor Strength and Fascicle Length in Professional Female Soccer Players. Int J Sports Phys Ther. 2021 Apr 1;16(2):459-467. doi: 10.26603/001c.19452.
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Primaire voltooiing (Geschat)
Studie voltooiing (Geschat)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
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Laatste update ingediend die voldeed aan QC-criteria
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Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Andere studie-ID-nummers
- 25.05.2026-05/82
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