Effect of Dynamic Sitting on Pain Development - Part 2

NCT07197879 | Recruiting

• 1 other identifier: 2025-05-12
• Study Type: interventional
• Target: 20
• Locations: 1 country
• Sites: 1

Brief Summary

As a follow-up project to the Dyn-Sit-Pain study, this research aims to investigate the overall health as well as the physical and mental well-being through dynamic office chairs. The development of an innovative dynamic office chair concept will be professionally and scientifically supported, and the developed prototypes will be examined within the framework of usability studies.

Conditions

Lower Back Pain

Outcome Measures

Primary Outcomes (1)

• Mean change in subjective lower back pain (before vs. after work, weekly average) estimated by visual analogue scale (VAS)

  Participants will rate their subjectively perceived lower back pain before and after a conventional occupational day on 5 consecutive days starting at baseline (week 1) and ending with the post-intervention visit (week 6). Subjectively perceived lower back pain will be assessed with a Visual Analogue Scale (VAS). The VAS used for this study ranges from 0 (none) to 100 points (strongest pain imaginable). Question: Please rate the level of your lower back pain at this moment.

  6 weeks

Secondary Outcomes (6)

• Mean change in subjective mental fatigue (before vs. after work, weekly average) estimated by VAS

  6 weeks

• Mean subjectively rated work performance (after work, weekly average) estimated by VAS

  6 weeks

• Change in impact of pain on the daily life (pre vs. post intervention) estimated by ODI-D

  6 weeks

• Usability estimated using the UEQS questionnaire

  6 weeks

• Sitting behaviors estimated by microcontrollers

  6 weeks

Study Arms (4)

Study Track 1: Group A

EXPERIMENTAL

The pre-existing static office chair will be used in the personal workplace for the first 6 weeks within the first half of the study. A wash-out period of a minimum of 4 weeks will be executed after the first half of the study. A dynamic office chair (saddle chair with standard pendulum mechanism) will be used on the personal workstation for 6 weeks within the second half of the study after the wash-out period.

Device: Dynamic office chair (saddle chair with standard pendulum mechanism)

Study Track 1: Group B

EXPERIMENTAL

A dynamic office chair (saddle chair with standard pendulum mechanism) will be used in the personal workplace for the first 6 weeks within the first half of the study. A wash-out period of a minimum of 4 weeks will be executed after the first half of the study. The pre-existing static office chair will be used on the personal workstation for 6 weeks within the second half of the study after the wash-out period.

Device: Dynamic office chair (saddle chair with standard pendulum mechanism)

Study Track 2: Group C

EXPERIMENTAL

The pre-existing static office chair will be used in the personal workplace for the first 6 weeks within the first half of the study. A wash-out period of a minimum of 4 weeks will be executed after the first half of the study. A dynamic office chair (office swivel chair with integrated newly developed pendulum mechanism) will be used on the personal workstation for 6 weeks within the second half of the study after the wash-out period.

Device: Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)

Study Track 2: Group D

EXPERIMENTAL

A dynamic office chair (office swivel chair with integrated newly developed pendulum mechanism) will be used in the personal workplace for the first 6 weeks within the first half of the study. A wash-out period of a minimum of 4 weeks will be executed after the first half of the study. The pre-existing static office chair will be used on the personal workstation for 6 weeks within the second half of the study after the wash-out period.

Device: Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)

Interventions

Dynamic office chair (saddle chair with standard pendulum mechanism) DEVICE

The dynamic office chair has a typical office chair design (e.g. seat pan and a lumbar support). The seat pan is mounted on a flexible mechanic construction that allows hip movements in the frontal plane while sitting.

Study Track 1: Group A; Study Track 1: Group B

Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism) DEVICE

The dynamic office chair has a typical office chair design (e.g. seat pan and a lumbar support). The seat pan is mounted on a flexible mechanic construction that allows hip movements in the frontal plane while sitting.

Study Track 2: Group C; Study Track 2: Group D

Eligibility Criteria

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

You may qualify if:

• Signed Informed consent
• People aged between 18 and 65 years
• People classified as pain developers (e.g.: a 10 mm increase in pain on a 100 mm paper-based VAS)
• Office workers
• Employment status: \> 25 h / week
• Sufficient knowledge of German (min. B2 level)
• Body height of at least 160cm required
• Electrically or manually height-adjustable table at main workstation

You may not qualify if:

• Physical or mental limitations that make dynamic sitting or use of the procedure chair difficult (e.g. wheelchair users, vestibular dysfunction)
• Pregnancy
• Sitting for less than 20 hours per week at the main workplace
• Body weight over 110 kg and a body height over 195 cm
• Regular therapy or medication for pain or medication that affects the perception of pain (e.g. certain psychotropic drugs according to the package leaflet)
• office chair to which it is not possible to attach the swivel mechanism prototype
• Presence of any chronic disease that may influence pain perception (e.g., chronic kidney disease, fibromyalgia, neuropathy, chronic fatigue syndrome)

Sponsors & Collaborators

• University of Applied Sciences for Health Professions Upper Austria: lead

Study Sites (1)

University of Applied Sciences for Health Professions Upper Austria

Linz, Upper Austria, 4020, Austria

RECRUITING

MeSH Terms

Conditions

Low Back Pain

Condition Hierarchy (Ancestors)

Back Pain; Pain; Neurologic Manifestations; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: September 26, 2025
• First Posted: September 29, 2025
• Study Start: May 12, 2025
• Primary Completion (Estimated): December 31, 2026
• Study Completion (Estimated): March 31, 2027
• Last Updated: September 29, 2025

Record last verified: 2025-09

Data Sharing

• IPD Sharing: Will not share

Locations

AU (1)