Do fixed or personalised sit-stand desk ratios improve lower back pain? A randomised trial
Charlotte L Brakenridge1, Venerina Johnston2, Nicole E Andrews3
1Centre for Work, Organisation and Wellbeing, Griffith University, Nathan, Queensland, Australia; School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland, Australia; RECOVER Injury Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Applied Ergonomics
|October 22, 2025
Summary
A fixed 30:15 sit-stand ratio effectively reduced lower back pain (LBP) and improved work outcomes. Personalized ratios showed less benefit, though both were acceptable. This highlights fixed ratios for LBP management.
Area of Science:
- Occupational Health
- Ergonomics
- Musculoskeletal Disorders
Background:
- Desk-based work is associated with increased risk of lower back pain (LBP).
- Sit-stand workstations offer a potential intervention to mitigate LBP by alternating postures.
- The optimal sit-stand ratio for managing LBP and improving work outcomes remains unclear.
Purpose of the Study:
- To compare the effectiveness, acceptability, and adherence of two sit-stand desk protocols on LBP and secondary outcomes.
- To evaluate a fixed sit-stand ratio (30 min sitting:15 min standing) against a personalized, self-selected ratio.
Main Methods:
- Fifty-six desk workers with LBP were randomized into fixed or personalized sit-stand ratio groups.
- Intervention lasted 3 months, with LBP measured via an app.
- Secondary outcomes included job stress, concentration, presenteeism, and sitting time.
Main Results:
- The fixed ratio group showed significant reductions in worst and average LBP.
- The personalized ratio group only showed a reduction in worst LBP.
- Fixed ratio participants reported improvements in job stress, concentration, and presenteeism; personalized ratio users reduced sitting time.
- Adherence was higher in the fixed ratio group, and both protocols were acceptable.
Conclusions:
- A 30:15 sit-stand ratio is an acceptable and effective intervention for reducing LBP in desk workers in the short term.
- Fixed sit-stand ratios may offer greater benefits for LBP and work-related outcomes compared to personalized approaches.
- Further research is needed to explore long-term effects and optimal personalized strategies.
