Actively Recruiting
The Effects of Balanced Seating Pressure on Pelvic Asymmetry in Under-Buttocks Pressure, Spinal Alignment, and Lower Back Pain: A Pilot Study
Led by Chang Gung Memorial Hospital · Updated on 2026-01-27
20
Participants Needed
1
Research Sites
7 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
Researchers are studying adults aged 20 to 50 years with non-specific low back pain worsened by sitting to see if the DaSuit4 cushion can reduce discomfort. The study aims to compare pressure distribution and spinal alignment when using the DaSuit4 cushion versus a placebo cushion. It also monitors any discomfort or adverse effects from using the cushion. Participants will take part in a randomized, double-blind, placebo-controlled, two-period crossover trial. Each participant will sit for 10 minutes on the DaSuit4 cushion and 10 minutes on a placebo cushion in random order, separated by a 10-minute washout period during which they will walk. Sitting will be on a standardized wooden chair with a pressure sensor mat on the cushion surface. A tablet will be used to help maintain gaze and posture. During the study, researchers will measure under-buttock pressure, spinal alignment through X-rays, and pain intensity using a visual analog scale. Participants will report any pain or discomfort experienced during or after sessions. Safety and physical effects will be closely monitored. The total participation involves two short sitting sessions with assessments and a washout period in between.
CONDITIONS
Brief Title
The Effects of Balanced Seating Pressure on Pelvic Asymmetry: A Pilot Study
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Adults aged 20 to 50 years
- Experiencing non-specific low back pain worsened by sitting with a pain score between 3 and 7
- Height between 150 and 180 cm
- Body mass index (BMI) between 18.5 and 24
- Radiographically confirmed hemi-pelvic height discrepancy of at least 0.3 cm while sitting
- Willing and able to participate throughout the intervention sessions
You will not qualify if you...
- Unable to sit for 20 minutes
- Mini-Mental State Examination (MMSE) score below 24
- Significant spinal or pelvic disorders such as fractures, surgeries, or herniated discs with nerve compression
- Diagnosed scoliosis with a Cobb angle of 20 degrees or more
- Recent use of painkillers or muscle relaxants
- Pregnancy
- Skin conditions that affect sitting tolerance
AI-Screening
AI-Powered Screening
Complete this quick 3-step screening to check your eligibility
Your Study Journey
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
1 screening and enrollment visit (in-person)
Duration - Single day with sessions lasting approximately 30 to 40 minutes including washout
Participants will undergo two intervention sessions sitting on either the DaSuit® cushion or the placebo cushion in randomized order. Each sitting lasts approximately 10 minutes with a 10-minute walking washout period in between to minimize carry-over effects.
1 visit with 2 sitting sessions and a washout period
Duration - Concurrent with intervention visit
Radiographic imaging and pressure measurements are taken during and after each sitting session to assess pelvic asymmetry, spinal alignment, and pressure distribution.
Included within the intervention visit
Trial Site Locations
Total: 1 location
1
Taoyuan Chang Gung Memorial Hospital
Taoyuan, Taiwan, Taiwan, 333
Actively Recruiting
Research Team
W
Wei-Han Chang, M.D., PhD.
H
Hander Wang, M.D.
How is the study designed?
Study Type
INTERVENTIONAL
Masking
QUADRUPLE
Allocation
RANDOMIZED
Model
CROSSOVER
Primary Purpose
TREATMENT
Number of Arms
2
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