Comparing 30-second and 60-second passive stretching for hamstring flexibility

"Effects of Passive Static Stretching of 30 Seconds Versus 60 Seconds on the Hamstring Flexibility in Adults With Hamstring Tightness.

Not applicable Interventional Foundation University Islamabad · NCT06437613

This study is testing whether stretching the hamstrings for 30 seconds or 60 seconds helps adults aged 18-45 with tight hamstrings become more flexible.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment32 (estimated)
Ages18 Years to 45 Years
SexAll
SponsorFoundation University Islamabad Academic / other
Locations1 site (Rawalpindi, Punjab Province)
Trial IDNCT06437613 on ClinicalTrials.gov

What this trial studies

This study aims to evaluate the effects of two different durations of passive static stretching (30 seconds vs. 60 seconds) on hamstring flexibility in adults aged 18-45 with hamstring tightness. Participants will undergo baseline assessments using various flexibility tests, including the Active Knee Extension Test and the Straight Leg Raise. They will then be randomized into two groups to receive the respective stretching interventions, with flexibility measured again after four weeks. The study is conducted at the Rehabilitation department of Fauji Foundation Hospital.

Who should consider this trial

Good fit: Ideal candidates for this study are adults aged 18-45 with hamstring tightness and a minimum reduction of 15 degrees in knee extension position.

Not a fit: Patients over 45 years old or those with acute or chronic musculoskeletal, neurologic, cardiovascular, or systemic conditions may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide insights into optimal stretching durations to improve hamstring flexibility, benefiting individuals with tight hamstrings.

How similar studies have performed: While there have been studies on stretching techniques, this specific comparison of 30-second versus 60-second passive stretching is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion criteria:

* Adults age ranging from 18-45 years
* Both males and females are included in the study
* Individuals with 90 degree hip flexion having a minimum reduction of 15 degrees in knee extension position.

Exclusion criteria :

* Old adults
* Individuals suffering from any acute or chronic co-morbidities of musculoskeletal, neurologic, cardiovascular or systemic origin
* Post-surgical cases
* Hamstring strain or any other dysfunction in past two years.

Where this trial is running

Rawalpindi, Punjab Province

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Hamstring Flexibility
Last reviewed 2026-06-09 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.