Effect of Forward Head Posture on Knee Joint Proprioception

NCT07439588 | Completed

• 1 other identifier: P.T.REC/012/006195
• Study Type: observational
• Target: 70
• Locations: 1 country
• Sites: 1

Brief 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.

Conditions

FORWARD HEAD POSTURE

Keywords

FORWARD HEAD POSTURE; Knee Proprioception; Postural Balance

Outcome Measures

Primary Outcomes (2)

• Knee Proprioception

  Proprioception evaluation will be started by using the isokinetic system in measurement of JPS by active joint reproduction test.

  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.

  once

Secondary Outcomes (1)

• Craniovertebral Angle (CVA)

  once

Study Arms (2)

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.

Device: Isokinetic Dynamometer

Normal Head Posture

Measured the same as Forward Head Posture Group

Device: Isokinetic Dynamometer

Interventions

Isokinetic Dynamometer DEVICE

Isokinetic dynamometry is considered a valid and reliable method for assessing knee proprioception, particularly joint position sense (JPS).

Also known as: Biodex Balance

Forward Head Posture; Normal Head Posture

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: all
• Age Groups: Adult (18-64)
• Sampling Method: Probability Sample

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

You may qualify if:

• 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°.

You may not qualify if:

• 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

Sponsors & Collaborators

• Cairo University: lead

Study Sites (1)

Mariam elsayed elsayed salah

Giza, 12512, Egypt

Location

Study Design

• Study Type: observational
• Observational Model: CASE CONTROL
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Teaching Assistant

Study Record Dates

• First Submitted: February 23, 2026
• First Posted: February 27, 2026
• Study Start: November 2, 2025
• Primary Completion: February 2, 2026
• Study Completion: February 15, 2026
• Last Updated: February 27, 2026

Record last verified: 2026-02

Locations

EG (1)