Static hamstring stretching versus full-range Romanian deadlifts to improve back-of-thigh flexibility
Comparison of the Effects of Static Stretching and Full Range of Motion Strength Training on Posterior Band Flexibility
This 6-week program will test whether once-weekly 2×60s static stretches or once-weekly 3×10 full-range Romanian deadlifts better improve hamstring (toe-to-floor) flexibility in adults.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 51 (estimated) |
| Ages | 18 Years to 30 Years |
| Sex | All |
| Sponsor | Józef Piłsudski University of Physical Education Academic / other |
| Locations | 1 site (Warsaw) |
| Trial ID | NCT07061041 on ClinicalTrials.gov |
What this trial studies
Adults with no recent lower-limb, spine, or craniocerebral injuries will be assigned to one of two non-invasive, once-weekly interventions for six weeks. The stretching group will perform two series of 60-second posterior-chain static stretches while prone with the knee extended. The strength group will perform three sets of 10 Romanian deadlifts through full range of motion once per week. Toe-to-floor flexibility will be measured before and after the intervention to compare changes between groups.
Who should consider this trial
Good fit: Adults over 18 with no lower-limb, spinal, or craniocerebral injuries or surgeries in the previous six months are ideal candidates.
Not a fit: People under 18, or those with recent lower-limb, spine, or head injuries or surgeries within six months, or with significant neurologic conditions are unlikely to be eligible or to benefit from these protocols.
Why it matters
Potential benefit: If successful, the finding could identify a simple, low‑dose exercise option to improve hamstring flexibility and reduce stiffness.
How similar studies have performed: Previous research shows both static stretching and targeted strength training can improve hamstring flexibility, so this comparison builds on existing evidence rather than being wholly novel.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Age over 18 years, * No lower limb injuries, no spinal injuries and no craniocerebral injuries in the last 6 months, * No lower limb surgeries, no spinal surgeries and no central nervous system surgeries in the last 6 months, Exclusion Criteria: * Age under 18 years * Injuries to the lower limbs, spine or craniocerebral injuries within the last 6 months, * Surgical procedures to the lower limbs, spine or surgical procedures to the central nervous system within the last 6 months,
Where this trial is running
Warsaw
- Józef Piłsudski Academy of Physical Education in Warsaw — Warsaw, Poland (Recruiting)
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.