Determining the Minimal Effective Dose of Static Stretching for Increasing Range of Motion in Adults

The study is planned to be conducted in 2025. The methods used in the study are non-invasive methods. The study groups will perform 1 to 3 static stretching sessions per week. The number of series per session will be from 1 to 3. The static stretching time of the back band in the series will be from 20 s to 60 s. The total stretching time per week will be from 45 s to 135 s. The break between series will be 45 s, and the duration of the intervention will be from 6 to 8 weeks. During stretching, the subject maintains a maximum bend with straight knee joints for a specified time. Before starting the study, participants will undergo a toe-to-floor test to assess the flexibility of the back band. The test will be repeated after the intervention. The aim of the study is to determine the minimum effective dose of static stretching. Currently, anecdotal evidence suggests that this dose is 90 seconds of static stretching per week.

The study does not involve any likelihood of harm to study participants as a result of participating in the study.

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Key information

Conditions

Static Stretching

Age range

18 year–25 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Józef Piłsudski Academy of Physical Education in Warsaw

Warsaw, Poland

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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,

Treatment and study plan

Training - static streching

Other

The intervention group performed one training session per week. Each training session consisted of 2 series of static stretching of the back band. The rest time between series was 45 s. The intervention lasted 6 weeks.

Primary outcomes

Flexibility

Time frame: From registration to completion of the study, the duration is up to 8 weeks

Flexibility was assessed using a modified stand-and-reach test. The participants stood with their feet shoulder-width apart and knees fully extended, then performed a forward bend, reaching as far as possible while maintaining straight legs. To measure the extent of their reach, a custom-built box was used. The box had the following dimensions: a length of 40 cm, a width of 45 cm, and a height of 35 cm. Each participant performed the test once. The same test was repeated after the 6-week intervention period to determine any improvements in flexibility.

Sponsors and collaborators

Lead sponsor

Józef Piłsudski University of Physical Education

Other

Registry information

Important dates

Study start: 2025
Primary completion: 2025
Study completion: 2025
First posted: May 7, 2025
Registry last updated: Jun 22, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed