Comparison of the Effects of Static Stretching and Full Range of Motion Strength Training on Posterior Band Flexibility

NCT07061041 | Completed

• 1 other identifier: SKE.0030.59.2025
• Study Type: interventional
• Target: 54
• Locations: 1 country
• Sites: 1

Brief Summary

The study will be conducted in 2025. The methods used in the study are non-invasive methods. One study group will perform 2 series of static stretching of the posterior band once a week. The stretching time in each series will be 60s, and the duration of the intervention will be 6 weeks. The test subjects will maintain a maximum prone position with their knee joints straight for a specified period of time during the stretching. The second study group will perform full range of motion strength training in the form of 3 series of 10 repetitions of the Romanian Deadlift (RDL) once a week, with the intervention duration also being 6 weeks. Prior to the start of the study, participants will undergo a toe-to-floor test to assess posterior band flexibility. The test will be repeated again after the intervention.

Conditions

Flexibility; Strength Training Effects; Static Stretching

Keywords

flexibility; static streching; minimal-dose; hamstring flexibility

Outcome Measures

Primary Outcomes (1)

• Flexibility

  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 two trials, and the mean value was used for statistical analysis.. The same test was repeated after the 6-week intervention period to determine any improvements in flexibility.

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

Study Arms (3)

Control group

NO INTERVENTION

Only tests were performed in the group, no intervention was introduced

Streching group

EXPERIMENTAL

The group performed one training session per week consisting of 2 sets of 60 seconds of static stretching

Other: Streching group

Strength training group

EXPERIMENTAL

The group will perform one workout per week consisting of 3 series of the "Romanian deadlift" exercise of 10 repetitions. Each repetition will be performed at a specific pace - 3s in eccentric contraction and 1s in concentric contraction. The aforementioned exercise, the Romanian deadlift, will be performed by the subjects on a platform (elevation) in order to achieve maximum range of motion.

Other: Strength training

Interventions

Strength training OTHER

The group will perform one workout per week consisting of 3 series of the "Romanian deadlift" exercise of 10 repetitions. Each repetition will be performed at a specific pace - 3s in eccentric contraction and 1s in concentric contraction. The aforementioned exercise, the Romanian deadlift, will be performed by the subjects on a platform (elevation) in order to achieve maximum range of motion.

Strength training group

Streching group OTHER

The group performed one training session per week consisting of 2 sets of 60 seconds of static stretching

Streching group

Eligibility Criteria

• Age: 18 Years - 25 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Participants were required to be ≥18 years of age and free from musculoskeletal injuries or surgical procedures involving the lower extremities or trunk within the previous six months.

You may not qualify if:

• Participants were excluded if they were \<18 years of age or had sustained a musculoskeletal injury or undergone surgery involving the lower extremities or trunk within the previous six months.

Sponsors & Collaborators

• Józef Piłsudski University of Physical Education: lead

Study Sites (1)

Józef Piłsudski Academy of Physical Education in Warsaw

Warsaw, 00-968, Poland

Location

Related Publications (2)

• Shadmehr A, Hadian MR, Naiemi SS, Jalaie S. Hamstring flexibility in young women following passive stretch and muscle energy technique. J Back Musculoskelet Rehabil. 2009;22(3):143-8. doi: 10.3233/BMR-2009-0227.

  PMID: 20023343 BACKGROUND

• Rosenfeldt M, Stien N, Behm DG, Saeterbakken AH, Andersen V. Comparison of resistance training vs static stretching on flexibility and maximal strength in healthy physically active adults, a randomized controlled trial. BMC Sports Sci Med Rehabil. 2024 Jun 28;16(1):142. doi: 10.1186/s13102-024-00934-1.

  PMID: 38943165 BACKGROUND

MeSH Terms

Interventions

Resistance Training

Intervention Hierarchy (Ancestors)

Exercise Therapy; Rehabilitation; Aftercare; Continuity of Patient Care; Patient Care; Therapeutics; Physical Therapy Modalities; Physical Conditioning, Human; Exercise; Motor Activity; Movement; Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: SINGLE
• Who Masked: OUTCOMES ASSESSOR
• Masking Details: The post-intervention measurements were conducted by an assessor who was trained in the testing procedure and blinded to group allocation, with no knowledge of whether participants belonged to the intervention or control groups.
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Laboratory Assistant

Study Record Dates

• First Submitted: July 2, 2025
• First Posted: July 11, 2025
• Study Start: July 2, 2025
• Primary Completion: August 20, 2025
• Study Completion: August 25, 2025
• Last Updated: July 20, 2026

Record last verified: 2026-07

Data Sharing

• IPD Sharing: Will not share

Locations

PL (1)