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Stretching showdown: which technique loosens tight hamstrings best?

NCT ID NCT07153510

Symptom relief Sponsor: University of Health Sciences Lahore Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study compares two stretching techniques—post-isometric relaxation and active static stretching—to see which improves hamstring flexibility more in healthy university students aged 18 to 25. Fifty-four participants will be randomly assigned to one of the two methods and stretch three times a week for four weeks. Flexibility is measured before and after using the Active Knee Extension test. The results may help physiotherapy students and clinicians choose the most effective stretching approach.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Post-Isometric Relaxation and Active Static Stretching
What this could lead to
If one method proves better, it could guide physiotherapy students and clinicians toward a more effective stretching technique for hamstring tightness.
What could go wrong
This is a small, early-stage trial in healthy young adults, so results may not apply to older people or those with injuries. The difference between methods may be small.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

54 people

The number who actually took part.

Started

Apr 2025

Expected to finish

Sep 2025

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 25 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Aged 18-25 years, Active Knee Extension (AKE) test angle \> 20°, Willing to participate and provide informed consent Exclusion Criteria: * Any history of hamstring strain or lower limb injury in the past 6 months, Neurological or musculoskeletal disorders, Participation in other flexibility or stretching programs

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Hamstring flexibility Hamstring tightness

Contacts and locations

Locations

  • University of Health Sciences

    Lahore, Punjab Province, 54600, Pakistan

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