Viscous Elastic Properties of Superficial Back Muscles in Individuals With Hyperkyphosis

NCT07441213 | Completed

• 1 other identifier: hakanpolat13
• Study Type: observational
• Target: 88
• Locations: 1 country
• Sites: 1

Brief Summary

Thoracic hyperkyphosis is a common spinal deformity that may alter the biomechanical and viscoelastic properties of trunk muscles. This comparative study aims to investigate differences in the mechanical properties of selected back and chest muscles between individuals with hyperkyphosis and healthy controls. A total of 88 participants will be categorized based on thoracic kyphosis angle (≥50° hyperkyphosis; \<50° control). The kyphosis angle will be measured using a flexible ruler method. Muscle tone, stiffness, elasticity, and relaxation properties of the trapezius, erector spinae, and pectoralis major muscles will be assessed using a handheld myotonometer. Spinal appearance perception will be evaluated using a kyphosis-specific questionnaire. The study is designed to examine whether differences exist in muscle mechanical properties and whether kyphosis severity is associated with asymmetry in viscoelastic muscle characteristics.

Conditions

Hyperkyphosis; Viscoelasticity

Keywords

viscoelasticity; hyperkyphosis

Outcome Measures

Primary Outcomes (5)

• Flexible Ruler

  Flexible Ruler The flexible ruler method is a reliable method used to measure cervical, thoracic, and lumbar spine curvature. The measurement is taken using a 40 cm long flexible ruler while standing with arms relaxed at the sides, head upright, and eyes looking straight ahead. The C2 and C7 vertebrae are palpated and marked using removable adhesive skin markers. The flexible ruler is then placed over the cervical lordosis between these two points, and markers indicating the location of the C2 and C7 spinous processes are placed on it. The flexible ruler is placed on millimeter paper, and the resulting curve is reflected. A vertical angle is drawn from the peak of the curve to the baseline, and the cervical lordosis deviation angle is determined using an angle-to-angle connection

  3 months

• MyotonPro- Tone

  Viscoelastic Properties of Muscles The MyotonPro® device can determine the stiffness, tone, and elasticity properties of muscles. This previously calibrated device creates a mechanical stimulus that induces the damped natural oscillations of the tissues using a 3 mm diameter probe placed perpendicular to the muscle with a non-invasive handheld feature. The resulting oscillations are recorded by an accelerometer. MyotonPro® is a valid and reliable method for determining muscle tone.

  3 months

• Kyphosis-Specific Spine Appearance Questionnaire

  Kyphosis-Specific Spine Appearance Questionnaire The Kyphosis-Specific Spine Appearance Questionnaire consisted of 10 items on a Likert scale (1 to 5) regarding patients' perceptions of appearance; higher scores indicated worsening deformity and increased concern about kyphosis-specific appearance. The first item is based on drawings showing varying degrees of severity of hyperkyphosis deformity in the sagittal plane. Questions two through ten are based on textual questions that rate concerns about other aspects of spinal deformity appearance. The total score of the questionnaire is calculated as the average of the ten responses

  3 months

• myoton pro- stiffness

  Viscoelastic Properties of Muscles The MyotonPro® device can determine the stiffness, tone, and elasticity properties of muscles. This previously calibrated device creates a mechanical stimulus that induces the damped natural oscillations of the tissues using a 3 mm diameter probe placed perpendicular to the muscle with a non-invasive handheld feature. The resulting oscillations are recorded by an accelerometer. MyotonPro® is a valid and reliable method for determining muscle stiffness.

  3 months

• myoton pro - elasticity

  Viscoelastic Properties of Muscles The MyotonPro® device can determine the stiffness, tone, and elasticity properties of muscles. This previously calibrated device creates a mechanical stimulus that induces the damped natural oscillations of the tissues using a 3 mm diameter probe placed perpendicular to the muscle with a non-invasive handheld feature. The resulting oscillations are recorded by an accelerometer. MyotonPro® is a valid and reliable method for determining muscle elasticity.

  3 months

Study Arms (1)

individuals with hyperkyphosis

thoracic kyphosis angles of ≥ 50◦ hyperkyphosis

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

individual with hyperkyphosis

You may not qualify if:

• individuals with scoliosis, Scheuermann's kyphosis, and other congenital spinal problems.

Sponsors & Collaborators

• Sanko University: lead

Study Sites (1)

Sanko Unıversıty

Gaziantep, Gaziantep, 27090, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Kyphosis

Condition Hierarchy (Ancestors)

Spinal Curvatures; Spinal Diseases; Bone Diseases; Musculoskeletal Diseases

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: dırector

Study Record Dates

• First Submitted: February 18, 2026
• First Posted: February 27, 2026
• Study Start: November 1, 2025
• Primary Completion: December 15, 2025
• Study Completion: January 15, 2026
• Last Updated: February 27, 2026

Record last verified: 2026-02

Locations

TU (1)