Glenohumeral Internal Rotation Deficit (GIRD)PRE-DISMNCT07910578
Immediate Effects of Postural Restoration Exercises and Breathing on Shoulder and Pelvic Mobility
A study testing Postural Restoration Exercises, Positional Exercises and Breathing Exercises in people with Glenohumeral Internal Rotation Deficit (GIRD) and Pelvic Alignment, run by Fooyin University at 1 site in Taiwan.
Trial summary
Prolonged sedentary behavior and habitual poor posture often lead to asymmetrical muscular loading and restricted joint mobility, such as glenohumeral internal rotation deficit (GIRD). Traditional interventions primarily focus on passive, localized stretching. Read more about this study
- Who is it for?
- Ages 22 to 31 yearsHealthy volunteers can take part
- Conditions the study is for
- Glenohumeral Internal Rotation Deficit (GIRD), Pelvic Alignment, Breathing Mechanics
- What is being tested?
- Postural Restoration Exercises, Positional Exercises and Breathing Exercises
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 66 participants
- Where
- 1 siteTaiwan
- Study dates
- 4 Mar 2024to 20 Mar 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 22 to 31 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Adults aged 18 to 40 years
- Ability to follow exercise instructions and testing guidelines
- A passive internal rotation range of motion of the right shoulder at least 10° less than that of the left side, and a passive adduction range of motion of the left hip at least 10° less than that of the right side
Who cannot join
- Diagnosed cardiovascular diseases, such as hypertension
- Vestibular dysfunction affecting balance
- Epilepsy
- A history of upper or lower extremity surgery, or current pain in related areas
- A history of musculoskeletal disorders or symptoms within the past year
Trial locations and contacts
1 site in 1 country.
Taiwan1 site
Kaohsiung Medical University Chung-Ho Memorial Hospital
Kaohsiung City, Kaohsiung City, 831
About this study
Official title: Immediate Effects of Postural Restoration Exercises Incorporating Respiratory Mechanics on Pelvic Alignment and Glenohumeral Internal Rotation Deficit in Healthy Young Adults: A Dismantling Study
Prolonged sedentary behavior and habitual poor posture often lead to asymmetrical muscular loading and restricted joint mobility, such as glenohumeral internal rotation deficit (GIRD). Traditional interventions primarily focus on passive, localized stretching. However, the human body functions as an interconnected kinetic chain, where the mobility of distal joints (like the shoulder) is heavily influenced by the axial alignment of the thorax and pelvis, as well as breathing mechanics.
This study aims to investigate the immediate effects of Postural Restoration Exercises (PRE)-which uniquely combine specific asymmetrical positioning with prolonged exhalation techniques-on pelvic alignment and shoulder mobility in healthy young adults. Using a dismantling design, participants are assigned to three groups: the Postural Restoration Exercise (PRE) group, the Positional Exercise (PE) group, and the Breathing Exercise (BE) group. By comparing these groups, the study seeks to isolate and clarify whether the restorative benefits stem primarily from limb positioning, breathing mechanics, or the integration of both. The ultimate goal is to provide evidence for a highly efficient, self-administered intervention to improve motor performance and reduce injury risk.
Read the detailed description
The innate structural asymmetry of the human body, such as the mass distribution of internal organs and the bilateral diaphragm, naturally predisposes the axial skeleton to specific rotational tendencies (e.g., rightward thoracic rotation). When this inherent asymmetry becomes "locked" due to prolonged poor posture, unilateral athletic demands, or injury, the neuromuscular system loses its dynamic adaptability. Consequently, the body relies on localized compensations in peripheral joints to accomplish symmetrical tasks, frequently resulting in conditions like glenohumeral internal rotation deficit (GIRD) and altered pelvic alignment.
Previous research suggests that interventions emphasizing pelvic repositioning combined with forceful exhalation can effectively address these functional asymmetries (Boyle et al., 2010). However, the independent contribution of specific respiratory mechanics versus positional loading within these multimodal interventions remains unclear.
This study extends the theoretical foundation of regional interdependence to investigate how "Dynamic Thoracic Positioning," driven by respiratory mechanics, influences distal joint kinematics. The intervention objective is not to eliminate innate asymmetry but to break patterned compensatory inertia. By utilizing a Pelvic Alignment Locator and Inclinometer (PALM™) to quantify spatial pelvic alignment and standard goniometry to assess hip and shoulder range of motion, this study evaluates the immediate neuromechanical resetting effects of PRE compared to isolated positional (PE) and breathing (BE) exercises."
- Being tested
- Postural Restoration Exercises, Positional Exercises, Breathing Exercises
- Keywords
- Postural Restoration Exercises (PRE), Dismantling Study, Respiratory Mechanics, Pelvic Alignment, Glenohumeral Internal Rotation Deficit (GIRD)
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Postural Restoration ExercisesOther
Participants receive postural restoration exercises incorporating pelvic repositioning and respiratory mechanics.
Positional ExercisesOther
Participants receive isolated positional exercises.
Breathing ExercisesOther
Participants receive isolated breathing exercises.
| Study group | Role | What they receive |
|---|---|---|
| Postural Restoration Exercise (PRE)Group | Experimental | Participants receive postural restoration exercises incorporating pelvic repositioning and respiratory mechanics. Receives: Other: Postural Restoration Exercises |
| Positional Exercise (PE)Group | Experimental | Participants receive isolated positional exercises. Receives: Other: Positional Exercises |
| Breathing Exercise(BE)Group | Experimental | Participants receive isolated breathing exercises. Receives: Other: Breathing Exercises |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Standing Pelvic Alignment
Measured using a Palpation Meter (PALM) and a smartphone clinometer application to evaluate standing pelvic tilt and pelvic rotation angles immediately before and after the intervention.
Measured: Baseline and immediately post-intervention (within 5 minutes after the single-session exercise)
Change in Glenohumeral Internal Rotation Range of Motion
Measured using a goniometer in a standardized position to evaluate changes in glenohumeral internal rotation range of motion immediately before and after the intervention.
Measured: Baseline and immediately post-intervention (within 5 minutes after the single-session exercise)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Nov 2026
- Study start4 Mar 2024
- Primary completion31 Dec 2024
- Study completion20 Mar 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Glenohumeral Internal Rotation Deficit (GIRD)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 66 participants (actual)
Sponsor and investigators
- Lead sponsor
- Fooyin University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Su-Chun Cheng, Fooyin University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07910578
- Sponsor's protocol ID
- T-KMU-40254
- Acronym
- PRE-DISM
- Status last verified
- Nov 2026
- First submitted
- 27 Oct 2026
- Last updated
- 3 Nov 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: de-identified participant data will be made available upon reasonable request directed to the corresponding author, starting from the time of publication.
Study at a glance
From the registry record, last updated by the sponsor on 3 Nov 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Immediate Effects of Postural Restoration Exercises Incorporating Respiratory Mechanics on Pelvic Alignment and Glenohumeral Internal Rotation Deficit in Healthy Young Adults: A Dismantling Study
- ClinicalTrials.gov ID
- NCT07910578
- Acronym / sponsor ID
- PRE-DISM / T-KMU-40254
- Keywords
- Postural Restoration Exercises (PRE), Dismantling Study, Respiratory Mechanics, Pelvic Alignment, Glenohumeral Internal Rotation Deficit (GIRD)
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 66 participants (actual)
- Lead sponsor
- Fooyin UniversityUniversity, hospital or other
- Study start
- 4 Mar 2024 (actual)
- Primary completion
- 31 Dec 2024 (actual)
- Study completion
- 20 Mar 2025 (actual)
- First posted
- 2 Nov 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Prolonged sedentary behavior and habitual poor posture often lead to asymmetrical muscular loading and restricted joint mobility, such as glenohumeral internal rotation deficit (GIRD). Traditional interventions primarily focus on passive, localized stretching. However, the human body functions as an interconnected kinetic chain, where the mobility of distal joints (like the shoulder) is heavily influenced by the axial alignment of the thorax and pelvis, as well as breathing mechanics.
This study aims to investigate the immediate effects of Postural Restoration Exercises (PRE)-which uniquely combine specific asymmetrical positioning with prolonged exhalation techniques-on pelvic alignment and shoulder mobility in healthy young adults. Using a dismantling design, participants are assigned to three groups: the Postural Restoration Exercise (PRE) group, the Positional Exercise (PE) group, and the Breathing Exercise (BE) group. By comparing these groups, the study seeks to isolate and clarify whether the restorative benefits stem primarily from limb positioning, breathing mechanics, or the integration of both. The ultimate goal is to provide evidence for a highly efficient, self-administered intervention to improve motor performance and reduce injury risk.
Detailed description
The innate structural asymmetry of the human body, such as the mass distribution of internal organs and the bilateral diaphragm, naturally predisposes the axial skeleton to specific rotational tendencies (e.g., rightward thoracic rotation). When this inherent asymmetry becomes "locked" due to prolonged poor posture, unilateral athletic demands, or injury, the neuromuscular system loses its dynamic adaptability. Consequently, the body relies on localized compensations in peripheral joints to accomplish symmetrical tasks, frequently resulting in conditions like glenohumeral internal rotation deficit (GIRD) and altered pelvic alignment.
Previous research suggests that interventions emphasizing pelvic repositioning combined with forceful exhalation can effectively address these functional asymmetries (Boyle et al., 2010). However, the independent contribution of specific respiratory mechanics versus positional loading within these multimodal interventions remains unclear.
This study extends the theoretical foundation of regional interdependence to investigate how "Dynamic Thoracic Positioning," driven by respiratory mechanics, influences distal joint kinematics. The intervention objective is not to eliminate innate asymmetry but to break patterned compensatory inertia. By utilizing a Pelvic Alignment Locator and Inclinometer (PALM™) to quantify spatial pelvic alignment and standard goniometry to assess hip and shoulder range of motion, this study evaluates the immediate neuromechanical resetting effects of PRE compared to isolated positional (PE) and breathing (BE) exercises."
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Postural Restoration Exercise (PRE)Group | Experimental | Other: Postural Restoration ExercisesParticipants receive postural restoration exercises incorporating pelvic repositioning and respiratory mechanics. |
| Positional Exercise (PE)Group | Experimental | Other: Positional ExercisesParticipants receive isolated positional exercises. |
| Breathing Exercise(BE)Group | Experimental | Other: Breathing ExercisesParticipants receive isolated breathing exercises. |
Who may qualify
- Ages
- 22 to 31 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (3 listed)
- Adults aged 18 to 40 years
- Ability to follow exercise instructions and testing guidelines
- A passive internal rotation range of motion of the right shoulder at least 10° less than that of the left side, and a passive adduction range of motion of the left hip at least 10° less than that of the right side
Key exclusion criteria (5 listed)
- Diagnosed cardiovascular diseases, such as hypertension
- Vestibular dysfunction affecting balance
- Epilepsy
- A history of upper or lower extremity surgery, or current pain in related areas
- A history of musculoskeletal disorders or symptoms within the past year
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Postural Restoration ExercisesParticipants receive postural restoration exercises incorporating pelvic repositioning and respiratory mechanics. | Other | Postural Restoration Exercise (PRE)Group |
| Positional ExercisesParticipants receive isolated positional exercises. | Other | Positional Exercise (PE)Group |
| Breathing ExercisesParticipants receive isolated breathing exercises. | Other | Breathing Exercise(BE)Group |
Primary outcome
Change in Standing Pelvic Alignment
Time frame: Baseline and immediately post-intervention (within 5 minutes after the single-session exercise)
Measured using a Palpation Meter (PALM) and a smartphone clinometer application to evaluate standing pelvic tilt and pelvic rotation angles immediately before and after the intervention.
Change in Glenohumeral Internal Rotation Range of Motion
Time frame: Baseline and immediately post-intervention (within 5 minutes after the single-session exercise)
Measured using a goniometer in a standardized position to evaluate changes in glenohumeral internal rotation range of motion immediately before and after the intervention.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Nov 2026.
- Individual participant dataSharing planned: Yes. de-identified participant data will be made available upon reasonable request directed to the corresponding author, starting from the time of publication.
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Postural Restoration Exercises, Positional Exercises and Breathing Exercises in people with Glenohumeral Internal Rotation Deficit (GIRD) and Pelvic Alignment, run by Fooyin University at 1 site in Taiwan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 3 Nov 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Taiwan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Standing Pelvic Alignment (time frame: Baseline and immediately post-intervention (within 5 minutes after the single-session exercise)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Nov 2026.