The Study
The effects of prolonged sitting, prolonged standing, and activity breaks on vascular function, and postprandial glucose and insulin responses: A randomised crossover trial
This study showed that taking short walking breaks while sitting made blood flow better and lowered insulin levels right after eating — but only in healthy young people and only for a few hours. It doesn't prove that doing this every day will prevent sickness, just what happens right after the breaks.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Sitting all day is bad for your legs and blood sugar, but standing all day isn't much better. Taking short walks every half hour helps your blood flow and lowers your insulin spike after meals.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 572 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — even healthy people benefit from moving more often; walking improves blood flow and insulin control better than standing still.
- 2Walking every 30 minutes for 2 minutes boosted leg blood flow by 80% and lowered insulin after meals by 28% compared to sitting.
- 3Standing only helped blood flow for the first hour and raised blood pressure.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
PLoS ONE
Year
2021
Authors
M. Peddie, C. Kessell, Tom Bergen, T. Gibbons, H. Campbell, J. Cotter, N. Rehrer, K. Thomas
Related Content
Claims (5)
In healthy adults aged 18–40, taking two-minute brisk walks every 30 minutes during six hours of sitting lowers the amount of insulin in the blood after eating by 28% compared to sitting continuously and by 19% compared to standing continuously, without changing blood glucose levels.
Standing for six hours after eating does not lower insulin levels more than sitting, and any short-term improvements in blood flow in the leg artery from standing disappear after four hours.
In healthy adults aged 18–40, sitting for 6 hours does not reduce the ability of the popliteal artery to dilate in response to increased blood flow, even though blood flow and shear rate decrease during this time.
In healthy adults aged 18–40, taking a 2-minute brisk walk every 30 minutes during 6 hours of sitting increases blood flow in the lower leg artery by 80% and increases the force of blood flow against the artery wall by 72% compared to sitting continuously, and these increases last the full 6 hours.
Sitting for long periods reduces the body's ability to process sugar after eating and raises blood glucose and blood pressure levels.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.