Balanced seating pressure to reduce pelvic asymmetry and sitting-related discomfort
The Effects of Balanced Seating Pressure on Pelvic Asymmetry in Under-Buttocks Pressure, Spinal Alignment, and Lower Back Pain: A Pilot Study
This trial will test whether the DaSuit® cushion evens under-buttock pressure and reduces sitting-related discomfort in adults 20–50 with non-specific low back pain and a measurable pelvic height difference.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 20 (estimated) |
| Ages | 20 Years to 50 Years |
| Sex | All |
| Sponsor | Chang Gung Memorial Hospital Academic / other |
| Locations | 1 site (Taoyuan, Taiwan) |
| Trial ID | NCT07062510 on ClinicalTrials.gov |
What this trial studies
This is a randomized, double-blind, placebo-controlled two-period crossover trial at Taoyuan Chang Gung Memorial Hospital enrolling about 20 adults with non-specific low back pain and a seated hemi-pelvic height discrepancy. Each participant will use the active DaSuit® cushion and a matched placebo cushion in two 10-minute sitting sessions separated by a 10-minute washout, with assignment order randomized. Primary measurements include under-buttock pressure distribution, objective spinal alignment measures, self-reported discomfort (VAS), and monitoring for any adverse events. The crossover design lets each person serve as their own control to reduce between-subject variability and detect immediate biomechanical and comfort effects.
Who should consider this trial
Good fit: Adults aged 20–50 with non-specific low back pain worsened by sitting (VAS 3–7), height 150–180 cm, BMI 18.5–24, and a seated hemi-pelvic height discrepancy ≥ 0.3 cm who can sit for the study procedures are the ideal candidates.
Not a fit: People with major spinal or pelvic pathology (fractures, prior surgeries, herniated discs with nerve compression), scoliosis with Cobb angle ≥ 20°, recent use of painkillers or muscle relaxants, pregnancy, inability to sit for 20 minutes, or skin conditions affecting sitting tolerance are unlikely to benefit from this cushion under this protocol.
Why it matters
Potential benefit: If effective, the DaSuit® cushion could provide a simple, non-invasive way to improve pressure balance and reduce sitting-related low back discomfort.
How similar studies have performed: Small prior studies of pressure-redistributing cushions have shown modest short-term comfort improvements, but device-specific evidence for correcting pelvic asymmetry or producing sustained benefit is limited.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: 1. adults aged 20 to 50 years 2. adults had low back pain non-specific but exacerbated by sitting with VAS score between 3-7 3. body height between 150-180 cm 4. BMI between 18.5-24 5. a radiographically verified hemi-pelvic height discrepancy of ≥ 0.3 cm in sitting posture 6. willing to participate and cooperate throughout the whole intervention session Exclusion Criteria: 1. inability to sit for 20 minutes 2. MMSE \< 24 3. significant spinal/pelvic disorders (e.g., fractures, surgeries, herniated discs with nerve compression) 4. scoliosis with Cobb angle ≥ 20° 5. recent use of pain killers and/or muscle relaxants 6. pregnancy 7. skin conditions affecting sitting tolerance.
Where this trial is running
Taoyuan, Taiwan
- Taoyuan Chang Gung Memorial Hospital — Taoyuan, Taiwan, Taiwan (Recruiting)
Study contacts
- Study coordinator: Wei-Han Chang, M.D., PhD.
- Email: weihan7252@gmail.com
- Phone: +886 975365711
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.