NCT07533617

Chair-Integrated Foam Modifications in Coccydynia

Ergonomic Effects of Material- and Geometry-Modified, Chair-Integrated Foams on Pressure Distribution, Pain, and Sitting Comfort in Individuals With Coccydynia

• Status: Enrolling By Invitation
• Phase: N/A
• Study type: Interventional
• Enrollment: 42 (estimated)
• Sponsor: KTO Karatay University · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

The aim of this study is to evaluate the effects of chairs with different ergonomic designs on quality of life, discomfort, and pain in individuals with coccydynia (tailbone pain).

Detailed description

Participants aged 18-65 years who work at a desk for at least 5-6 hours per day will be included in the study. Information such as age, height, body weight, education level, family type, smoking status, sex, marital status, working posture (sitting, standing, or both), duration of working hours, job type (production or administrative), regular exercise habits, presence of chronic diseases, and absence of any spinal problems (e.g., no diagnosed lumbar disc herniation) will be recorded. Participants will be randomly assigned to six groups. Before using the chairs, participants will be seated on a load cell-equipped chair to assess weight distribution. The distribution of body weight across different regions while sitting will be recorded in kilograms. This measurement will be repeated three times, and the average will be recorded. After the measurement, participants will be provided with specially designed chairs and asked to work using these chairs. Six different chair designs will be developed for the study. The reason for having six types of chairs is that the foam properties used in each chair will differ from one another.

Conditions

• Coccydynia

Interventions

Type	Name	Description
DEVICE	Ergonomic Chair	Participants will use ergonomically modified chairs with different foam properties during their working hours.

Timeline

• Start date: 2026-05-01
• Primary completion: 2026-06-01
• Completion: 2026-06-15
• First posted: 2026-04-16
• Last updated: 2026-04-16

Locations

1 site across 1 country: Turkey (Türkiye)