Lower Back PainDynSit-Pain 2NCT07197879
Effect of Dynamic Sitting on Pain Development - Part 2
A study testing Dynamic office chair (saddle chair with standard pendulum mechanism) and Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism) in people with Lower Back Pain, run by University of Applied Sciences for Health Professions Upper Austria at 1 site in Austria.
Trial 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. Read more about this study
- Who is it for?
- Ages 18 to 65 yearsHealthy volunteers can take part
- Conditions the study is for
- Lower Back Pain
- What is being tested?
- Dynamic office chair (saddle chair with standard pendulum mechanism) and Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 20 participants
- Where
- 1 siteAustria
- Study dates
- 12 May 2025to 31 Mar 2027
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
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 65 years
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- 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
Who cannot join
- 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)
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Austria1 site, 1 recruiting
- Recruiting
University of Applied Sciences for Health Professions Upper Austria
Linz, Upper Austria, 4020
Bernhard Schwartz, +43 50 344 20031, bernhard.schwartz@fhgooe.ac.at
About this study
Official title: Effect of Dynamic Sitting on Pain Development - Part 2 - a Randomized Controlled Cross-over Study
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.
Read the detailed description
This clinical trial is a prospective, randomised, controlled, open-label study with two tracks, each in a cross-over design investigating the effect of of two dynamic office chairs (saddle chair with standard pendulum mechanism [Smart Moving Technology], study track 2 = office swivel chair with integrated newly developed pendulum mechanism [Smart Moving Technology New]) on the musculoskeletal system of office workers classified as pain developers.
The study consists of a pre-screening visit and 4 assessment days / visits. After proving eligibility for the study (inclusion/exclusion criteria), subjects are assigned to one of the two study tracks. Subjects are randomised to one of the two study tracks and then to the respective group (Group A to D).
- Study track 1: saddle chair with standard pendulum mechanism (= intervention 1) + static office chair (= control)
- Study track 2: office swivel chair with integrated newly developed pendulum mechanism (= intervention 2) + static office chair (= control).
Depending on the study track and group allocation, the test subjects first receive a dynamic office chair (= intervention) or a static office chair (= control). The randomization will be realized with opaque envelopes in different colours and follows international recommendations.
Overall participants will execute identical assessments. A wash-put period between the control and the intervention phases ensures identical baseline conditions. The overall duration of study participation equals 16 weeks.
- Conditions
- Lower Back Pain
- Being tested
- Dynamic office chair (saddle chair with standard pendulum mechanism), Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)
- Medical subject headings
- Low Back Pain
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
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.
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 group | Role | What they receive |
|---|---|---|
| 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. Receives: 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. Receives: 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. Receives: 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. Receives: Device: Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism) |
What is being measured
The primary outcome is the main question the study is designed to answer.
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.
Measured: 6 weeks
Secondary outcomes (6)
Mean change in subjective mental fatigue (before vs. after work, weekly average) estimated by VAS
Participants will rate their subjectively perceived mental fatigue 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 mental fatigue will be assessed with a Visual Analogue Scale (VAS). The VAS used for this study ranges from 0 (none) to 100 points (strongest mental fatigue imaginable).
Question: Please rate the level of your mental fatigue at this moment.
Measured: 6 weeks
Mean subjectively rated work performance (after work, weekly average) estimated by VAS
Participants will rate their subjectively perceived working performance 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 working performance will be assessed with a Visual Analogue Scale (VAS). The VAS used for this study ranges from 0 (not productive at all) to 100 points (very productive).
Question: Please rate the level of your working performance on this working day.
Measured: 6 weeks
Change in impact of pain on the daily life (pre vs. post intervention) estimated by ODI-D
Participants will rate their subjectively perceived pain with the German version of the Oswestry Disability Index (ODI-D) at the baseline and post-intervention visits.
The ODI-D coverts 10 items: Pain intensity, Personal care, Lifting, Walking, Sitting, Standing, Sleeping, Sex (if applicable), Social and Travel. Each item consists of 6 statements which are scored from 0 (lowest disability) to 5 (highest disability).
Measured: 6 weeks
Usability estimated using the UEQS questionnaire
Subjects will rate the usability of the dynamic chair with the German version of the User Experience Questionnaire-Short version (UEQ-S) at the relevant post-intervention visit.
The UEQ-S cover both classical usability aspects (efficiency, perspicuity, dependability) and user experience aspects (originality, stimulation). It consists of 8 items, each rated on a seven-point scale with a ranked order. The endpoints of the items are (left to right): obstructive to supportive / complicated to easy / inefficient to efficient / confusing to clear / boring to exciting / not interesting to interesting / conventional to inventive and usual to leading edge.
Measured: 6 weeks
Sitting behaviors estimated by microcontrollers
The usage of the interventional chair will be tracked (i.e., the system cannot detect which person is sitting on it) by means of a microcontroller to determine if the dynamic chair was used or replaced within the interventional period.
Measured: 6 weeks
Number of adverse events estimated from an AEs form sheet
In the diary and at all study visits participants will be asked for new adverse events.
Measured: 16 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Sep 2025
- Study start12 May 2025
- Primary completion31 Dec 2026 (estimated)
- Study completion31 Mar 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Lower Back PainStudies of the same condition, open and under way.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Enrolment
- 20 participants (estimated)
Sponsor and investigators
- Lead sponsor
- University of Applied Sciences for Health Professions Upper Austria
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07197879
- Sponsor's protocol ID
- 2025-05-12
- Acronym
- DynSit-Pain 2
- Status last verified
- Sep 2025
- First submitted
- 26 Sep 2025
- Last updated
- 29 Sep 2025
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Sep 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effect of Dynamic Sitting on Pain Development - Part 2 - a Randomized Controlled Cross-over Study
- ClinicalTrials.gov ID
- NCT07197879
- Acronym / sponsor ID
- DynSit-Pain 2 / 2025-05-12
- Conditions
- Lower Back Pain
- Study type
- Interventional
- Recruitment status
- Recruiting
- Enrolment
- 20 participants (estimated)
- Lead sponsor
- University of Applied Sciences for Health Professions Upper AustriaUniversity, hospital or other
- Study start
- 12 May 2025 (actual)
- Primary completion
- 31 Dec 2026 (estimated)
- Study completion
- 31 Mar 2027 (estimated)
- First posted
- 29 Sep 2025 (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.
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.
Detailed description
This clinical trial is a prospective, randomised, controlled, open-label study with two tracks, each in a cross-over design investigating the effect of of two dynamic office chairs (saddle chair with standard pendulum mechanism [Smart Moving Technology], study track 2 = office swivel chair with integrated newly developed pendulum mechanism [Smart Moving Technology New]) on the musculoskeletal system of office workers classified as pain developers.
The study consists of a pre-screening visit and 4 assessment days / visits. After proving eligibility for the study (inclusion/exclusion criteria), subjects are assigned to one of the two study tracks. Subjects are randomised to one of the two study tracks and then to the respective group (Group A to D).
- Study track 1: saddle chair with standard pendulum mechanism (= intervention 1) + static office chair (= control)
- Study track 2: office swivel chair with integrated newly developed pendulum mechanism (= intervention 2) + static office chair (= control).
Depending on the study track and group allocation, the test subjects first receive a dynamic office chair (= intervention) or a static office chair (= control). The randomization will be realized with opaque envelopes in different colours and follows international recommendations.
Overall participants will execute identical assessments. A wash-put period between the control and the intervention phases ensures identical baseline conditions. The overall duration of study participation equals 16 weeks.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- None (open label)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Study Track 1: Group A | Experimental | Device: Dynamic office chair (saddle chair with standard pendulum mechanism)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. |
| Study Track 1: Group B | Experimental | Device: Dynamic office chair (saddle chair with standard pendulum mechanism)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. |
| Study Track 2: Group C | Experimental | Device: Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)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. |
| Study Track 2: Group D | Experimental | Device: Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)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. |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (8 listed)
- 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
Key exclusion criteria (7 listed)
- 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)
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 |
|---|---|---|
| Dynamic office chair (saddle chair with standard pendulum mechanism)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. | Device | Study Track 1: Group A, Study Track 1: Group B |
| Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism)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. | Device | Study Track 2: Group C, Study Track 2: Group D |
Primary outcome
Mean change in subjective lower back pain (before vs. after work, weekly average) estimated by visual analogue scale (VAS)
Time frame: 6 weeks
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 secondary outcomes
Mean change in subjective mental fatigue (before vs. after work, weekly average) estimated by VAS
Time frame: 6 weeks
Mean subjectively rated work performance (after work, weekly average) estimated by VAS
Time frame: 6 weeks
Change in impact of pain on the daily life (pre vs. post intervention) estimated by ODI-D
Time frame: 6 weeks
Usability estimated using the UEQS questionnaire
Time frame: 6 weeks
Sitting behaviors estimated by microcontrollers
Time frame: 6 weeks
Number of adverse events estimated from an AEs form sheet
Time frame: 16 weeks
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Sep 2025.
- Individual participant dataSharing planned: No
Related trials for Lower Back Pain
Recruiting
Effects of Virtual Reality Exergames Versus Spinal Manipulation in Chronic Nonspecific Low Back Pain
Chronic Nonspecific Low-back Pain, CNSLBP
Recruiting
Trans-arterial Embolization for the Treatment of Facet Pain Due to Facet Arthropathy
Facet Joint Arthropathy, Pain
Not yet recruiting
Radiofrequency and Pelvic Floor-Core Exercise for Chronic Low Back Pain in Women With Pelvic Floor Dysfunction
Chronic Low Back Pain, Urinary Incontinence
Recruiting
Meditation for Older Adults With Chronic Low Back Pain
Chronic Low Back Pain
Not yet recruiting
Comparison of High-Intensity and Conventional Physical Therapy in Musculoskeletal Disorders
Low Back Pain, Radicular Syndrome
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.
University of Applied Sciences for Health Professions Upper Austria
Linz, Austria
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Dynamic office chair (saddle chair with standard pendulum mechanism) and Dynamic Office Chair (office swivel chair with integrated newly developed pendulum mechanism) in people with Lower Back Pain, run by University of Applied Sciences for Health Professions Upper Austria at 1 site in Austria.
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 8 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: looking for participants now, as of the sponsor's last update on 29 Sep 2025. 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 Austria. 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?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Each site lists its own contact: choose the nearest one under Trial locations. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Mean change in subjective lower back pain (before vs. after work, weekly average) estimated by visual analogue scale (VAS) (time frame: 6 weeks). 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 29 Sep 2025.