FORWARD HEAD POSTURENCT07439588
Effect of Forward Head Posture on Knee Joint Proprioception
An observational study of FORWARD HEAD POSTURE, run by Cairo University at 1 site in Egypt.
Trial summary
The aim of the study is to investigate the effect of forward head posture on knee joint proprioception and to investigate the effect of forward head posture on balance. Read more about this study
- Who is it for?
- Ages 18 to 35 years
- Conditions the study is for
- FORWARD HEAD POSTURE
- What is being tested?
- Isokinetic Dynamometer
- Type of treatment
- Medical device
- How many people
- 70 participants
- Where
- 1 siteEgypt
- Study dates
- 2 Nov 2025to 15 Feb 2026
- Phase
- Observational
- 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 18 to 35 years
- All sexes
- Adult
Study population: A head position that is overly anterior in relation to the shoulder is common in people with FHP. This postural deviation is linked to neck pain, vestibular deficits, impaired proprioception, aberrant muscle activation, and changed breathing patterns
Who may be able to join
- Ages range from 18-35years old
- Participants are categorized as having FHP, the craniovertebral angle (CVA) measurement is used, FHP was classified as having a CVA < 53°; thus, participants were in the FHP group when CVA was <53°. Conversely, the control group was defined as having normal or no FHP when a participant's CVA was >53°.
Who cannot join
- Subjects will be excluded if they have:
- Fractures
- Neck pain
- Deformity of the spine or extremities
- A history of significant knee injury requiring medical treatment in the past 12 months
- Any inflammatory joint disease
- Primary Musculo-skeletal surgical interventions
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effect of Forward Head Posture on Knee Joint Proprioception and Postural Balance in Adults
The aim of the study is to investigate the effect of forward head posture on knee joint proprioception and to investigate the effect of forward head posture on balance.
Read the detailed description
Forward head posture (FHP) represents a prevalent sagittal plane deviation characterized by the anterior displacement of the head relative to the shoulder. While its impact on cervical proprioception and upper-body neuromuscular control is well-documented, current literature reveals significant gaps regarding its influence on distal joint function. This study aims to investigate the musculoskeletal system as a holistic kinetic chain, wherein cervical misalignment may necessitate compensatory adaptations throughout the body to maintain the center of gravity. Research indicates that FHP is frequently associated with an anterior pelvic tilt and altered ankle joint position errors, suggesting that postural deviations in the neck can diminish neuromuscular performance in the lower extremities. Given this interconnected nature, it is hypothesized that FHP similarly affects knee joint proprioception and stability. By evaluating these distal effects, this investigation seeks to clarify whether cervical postural deviations contribute to balance impairments or knee instability. The findings may have significant implications for clinical practice, potentially shifting rehabilitation paradigms to include cervical assessment and correction when treating patients with lower-limb injuries or chronic knee instability.
- Conditions
- FORWARD HEAD POSTURE
- Being tested
- Isokinetic Dynamometer
- Keywords
- FORWARD HEAD POSTURE, Knee Proprioception, Postural Balance
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Isokinetic DynamometerDevice
Also called Biodex Balance
Isokinetic dynamometry is considered a valid and reliable method for assessing knee proprioception, particularly joint position sense (JPS).
| Study group | Role | What they receive |
|---|---|---|
| Forward Head Posture | The study used a three-part objective assessment protocol to evaluate the relationship between cervical posture and distal physical function. Knee Joint Position Sense (JPS) is evaluated using an isokinetic dynamometer (Biodex) through an active joint reproduction test. Participants, seated with 80° trunk inclination, are asked to actively reproduce a 30° knee extension target from a 90° flexion starting position while blindfolded. Third, dynamic and static balance are assessed using the Biodex Balance System (BBS) on a movable circular platform. Participants perform bilateral stance tests across stability levels 12 through 2, maintaining their center of gravity relative to a visual target. The system records the Overall Stability Index (OSI) by sampling mediolateral and anteroposterior tilt degrees. All measurements are performed in triplicate, with standardized rest intervals and familiarization trials to ensure data reliability and prevent muscle fatigue. Receives: Device: Isokinetic Dynamometer | |
| Normal Head Posture | Measured the same as Forward Head Posture Group Receives: Device: Isokinetic Dynamometer |
What is being measured
The primary outcome is the main question the study is designed to answer.
Knee Proprioception
Proprioception evaluation will be started by using the isokinetic system in measurement of JPS by active joint reproduction test.
Measured: once
Postural Balance
The Biodex Balance System (BBS) is a widely recognized and reliable tool for assessing postural stability and balance control in both clinical and research settings.
Measured: once
Secondary outcomes (1)
Craniovertebral Angle (CVA)
the angle of intersection between a horizontal line and a line bisecting the tragus of the ear and the C7 spinous process.
Measured: once
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted27 Feb 2026
- Study start2 Nov 2025
- Primary completion2 Feb 2026
- Study completion15 Feb 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for FORWARD HEAD POSTUREStudies of the same condition, open and under way.
- More trials run by Cairo UniversityThe sponsor's other registered studies.
- 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
- Observational
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Enrolment
- 70 participants (actual)
Sponsor and investigators
- Lead sponsor
- Cairo University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Mariam Elsayed Elsayed Abdelkader Salah, Cairo University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07439588
- Sponsor's protocol ID
- P.T.REC/012/006195
- Status last verified
- Feb 2026
- First submitted
- 23 Feb 2026
- Last updated
- 27 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 27 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effect of Forward Head Posture on Knee Joint Proprioception and Postural Balance in Adults
- ClinicalTrials.gov ID
- NCT07439588
- Acronym / sponsor ID
- P.T.REC/012/006195
- Conditions
- FORWARD HEAD POSTURE
- Keywords
- FORWARD HEAD POSTURE, Knee Proprioception, Postural Balance
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 70 participants (actual)
- Lead sponsor
- Cairo UniversityUniversity, hospital or other
- Study start
- 2 Nov 2025 (actual)
- Primary completion
- 2 Feb 2026 (actual)
- Study completion
- 15 Feb 2026 (actual)
- First posted
- 27 Feb 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.
The aim of the study is to investigate the effect of forward head posture on knee joint proprioception and to investigate the effect of forward head posture on balance.
Detailed description
Forward head posture (FHP) represents a prevalent sagittal plane deviation characterized by the anterior displacement of the head relative to the shoulder. While its impact on cervical proprioception and upper-body neuromuscular control is well-documented, current literature reveals significant gaps regarding its influence on distal joint function. This study aims to investigate the musculoskeletal system as a holistic kinetic chain, wherein cervical misalignment may necessitate compensatory adaptations throughout the body to maintain the center of gravity. Research indicates that FHP is frequently associated with an anterior pelvic tilt and altered ankle joint position errors, suggesting that postural deviations in the neck can diminish neuromuscular performance in the lower extremities. Given this interconnected nature, it is hypothesized that FHP similarly affects knee joint proprioception and stability. By evaluating these distal effects, this investigation seeks to clarify whether cervical postural deviations contribute to balance impairments or knee instability. The findings may have significant implications for clinical practice, potentially shifting rehabilitation paradigms to include cervical assessment and correction when treating patients with lower-limb injuries or chronic knee instability.
Study design
- Observational model
- Case-control
- Time perspective
- Cross-sectional
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Forward Head Posture | – | Device: Isokinetic DynamometerThe study used a three-part objective assessment protocol to evaluate the relationship between cervical posture and distal physical function. Knee Joint Position Sense (JPS) is evaluated using an isokinetic dynamometer (Biodex) through an active joint reproduction test. Participants, seated with 80° trunk inclination, are asked to actively reproduce a 30° knee extension target from a 90° flexion starting position while blindfolded. Third, dynamic and static balance are assessed using the Biodex Balance System (BBS) on a movable circular platform. Participants perform bilateral stance tests across stability levels 12 through 2, maintaining their center of gravity relative to a visual target. The system records the Overall Stability Index (OSI) by sampling mediolateral and anteroposterior tilt degrees. All measurements are performed in triplicate, with standardized rest intervals and familiarization trials to ensure data reliability and prevent muscle fatigue. |
| Normal Head Posture | – | Device: Isokinetic DynamometerMeasured the same as Forward Head Posture Group |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- All
- Age groups
- Adult
- Study population
- A head position that is overly anterior in relation to the shoulder is common in people with FHP. This postural deviation is linked to neck pain, vestibular deficits, impaired proprioception, aberrant muscle activation, and changed breathing patterns
Key inclusion criteria (2 listed)
- Ages range from 18-35years old
- Participants are categorized as having FHP, the craniovertebral angle (CVA) measurement is used, FHP was classified as having a CVA < 53°; thus, participants were in the FHP group when CVA was <53°. Conversely, the control group was defined as having normal or no FHP when a participant's CVA was >53°.
Key exclusion criteria (7 listed)
- Subjects will be excluded if they have:
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 |
|---|---|---|
| Isokinetic DynamometerAlso: Biodex BalanceIsokinetic dynamometry is considered a valid and reliable method for assessing knee proprioception, particularly joint position sense (JPS). | Device | Forward Head Posture, Normal Head Posture |
Primary outcome
Knee Proprioception
Time frame: once
Proprioception evaluation will be started by using the isokinetic system in measurement of JPS by active joint reproduction test.
Postural Balance
Time frame: once
The Biodex Balance System (BBS) is a widely recognized and reliable tool for assessing postural stability and balance control in both clinical and research settings.
1 secondary outcome
Craniovertebral Angle (CVA)
Time frame: once
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 27 Feb 2026.
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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?
An observational study of FORWARD HEAD POSTURE, run by Cairo University at 1 site in Egypt.
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 2 inclusion and 7 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 27 Feb 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 Egypt. 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?
Knee Proprioception (time frame: once). 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 27 Feb 2026.