Blood Flow Restriction Nordic Hamstring in Elite Adolescent Athletes
Official title: Comparison of Hamstring Muscle Oxygenation Responses During Nordic Hamstring Exercise and Blood Flow Restriction Nordic Hamstring Exercise in Elite Adolescent Athletes: A Crossover Experimental Study
Run by Toros University · NCT07715786 · Data updated 2026-11-12
This crossover study tests whether adding blood flow restriction to the Nordic Hamstring Exercise changes muscle oxygenation in elite adolescent athletes aged 14–18.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 14 Years to 18 Years |
| Sex | All |
| Enrollment | 24 (estimated) |
| Sponsor | Toros University Academic / other |
| Locations | 1 site (Adana) |
| Status | Recruiting |
| Started | July 1, 2026 |
| Main results expected | July 2027 |
| Study ends | August 2027 |
| Registry record updated | July 20, 2026 |
| Trial ID | NCT07715786 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are elite adolescent athletes aged 14–18 with at least 3 years of regular training and no recent hamstring injuries.
✕Probably not a fit
Participants with recent lower-extremity injuries, significant medical conditions, or contraindications to blood flow restriction may not benefit from this intervention.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
In this crossover study, elite adolescent athletes will perform both the standard Nordic Hamstring Exercise and the same exercise with blood flow restriction in random order, separated by a 7-day washout. Muscle oxygen saturation and total hemoglobin will be monitored continuously with wearable near-infrared spectroscopy, alongside lactate, perceived exertion, and performance variables. The aim is to understand the acute physiological effects of combining blood flow restriction with eccentric hamstring work in healthy, trained youth. Findings could inform safer and more effective training approaches for this population. The study is conducted at the Adana Olympic Preparation Center with Toros University as lead sponsor.
Why it matters
Potential benefit: If successful, this approach could help tailor hamstring training to optimize metabolic stress and muscle response in young high-level athletes.
How similar studies have gone: Previous work suggests that BFR can alter muscle oxygenation during exercise, but evidence in elite adolescent populations performing NHE is limited and this study explores novelty in this specific combination.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Elite adolescent athletes aged 14 to 18 years. * Licensed athletes with at least 3 years of regular sports participation. * Currently participating in a regular weekly training program. * Physically able to complete the Nordic Hamstring Exercise and study testing protocol. * Willing to participate in the study. * Able to provide written informed consent. * For participants younger than 18 years, written informed consent provided by a parent or legal guardian and assent provided by the participant. Exclusion Criteria: * Hamstring injury within the previous 6 months. * Lower extremity surgery within the previous 6 months. * Current lower extremity pain or musculoskeletal injury that may interfere with exercise performance. * Cardiovascular, vascular, neurological, or other medical conditions that may contraindicate blood flow restriction exercise. * Presence of skin lesions or conditions preventing placement of the blood flow restriction cuff or MOXY sensor. * Inability to complete either exercise condition or follow the study protocol.
Where it's running
-
Adana Olympic Preparation Center
Adana, Turkey (Türkiye) Recruiting
Study contacts
- Study coordinator: İdil Ünlü, Assist. Prof. Dr.
- Email: idil.unlu@toros.edu.tr
- Phone: +90 506 515 66 22
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.