Nordic vs Blood Flow Restriction Nordic Exercise in Elite Female Pole Vaulters
10 juli 2026 uppdaterad av: Idil Esin Unlu, Toros University
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
The purpose of this randomized controlled trial is to compare the effects of Nordic Hamstring Exercise (NHE) and Blood Flow Restriction-assisted Nordic Hamstring Exercise (BFR-NHE) on hamstring muscle strength, muscle morphology, and functional performance in elite adolescent female pole vaulters.
Thirty-six athletes aged 12-18 years will be randomly assigned to a Nordic Hamstring Exercise group, a Blood Flow Restriction-assisted Nordic Hamstring Exercise group, or a control group.
Intervention groups will participate in supervised exercise training three times per week for eight weeks, while the control group will continue routine sports training.
Outcomes will be assessed before and after the intervention period.
Studieöversikt
Status
Rekrytering
Intervention / Behandling
Detaljerad beskrivning
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.
Studietyp
Interventionell
Inskrivning (Beräknad)
36
Fas
- Inte tillämpbar
Kontakter och platser
Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.
Studiekontakt
- Namn: İdil Esin Ünlü, Assist. Prof. Dr.
- Telefonnummer: +90 506 515 66 22
- E-post: idil.unlu@toros.edu.tr
Studieorter
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Adana, Turkiet (Türkiye)
- Rekrytering
- Adana Olympic Preparation Center
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Kontakt:
- Burçin Uğur, PHD
- Telefonnummer: +90 507 772 17 72
- E-post: burcnugur@yahoo.com
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Deltagandekriterier
Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.
Urvalskriterier
Åldrar som är berättigade till studier
- Barn
- Vuxen
Tar emot friska volontärer
Ja
Beskrivning
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.
Studieplan
Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Övrig
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Ingen (Open Label)
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
|---|---|
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Experimentell: 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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Experimentell: 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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Inget ingripande: Control
Participants will continue their routine sports training without additional hamstring-specific exercise intervention.
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Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Hamstring Muscle Strength
Tidsram: 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
Tidsram: 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
Tidsram: 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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Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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30-Meter Sprint Performance
Tidsram: 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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Samarbetspartners och utredare
Det är här du hittar personer och organisationer som är involverade i denna studie.
Sponsor
Publikationer och användbara länkar
Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.
Allmänna publikationer
- 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.
Studieavstämningsdatum
Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.
Studera stora datum
Studiestart (Faktisk)
27 maj 2026
Primärt slutförande (Beräknad)
1 mars 2027
Avslutad studie (Beräknad)
1 april 2027
Studieregistreringsdatum
Först inskickad
6 juli 2026
Först inskickad som uppfyllde QC-kriterierna
10 juli 2026
Första postat (Faktisk)
15 juli 2026
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
15 juli 2026
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
10 juli 2026
Senast verifierad
1 juli 2026
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
- 25.05.2026-05/82
Plan för individuella deltagardata (IPD)
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NEJ
Läkemedels- och apparatinformation, studiedokument
Studerar en amerikansk FDA-reglerad läkemedelsprodukt
Nej
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Nej
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