Short Walking Breaks Every Hour Counter Harms of Prolonged Sitting, Studies Show

Multiple peer-reviewed studies indicate that sitting for long, uninterrupted periods raises blood sugar, impairs artery function, and reduces brain blood flow — even in people who exercise regularly. Researchers found that taking just 2–5 minutes of walking every 20–60 minutes was enough to reverse or prevent these effects. A 2012 Diabetes Care study showed such breaks cut post-meal blood sugar spikes by roughly 24%, while a 2015 study found hourly five-minute walks fully preserved artery function that otherwise declined within an hour of sitting. A 2018 study further linked unbroken sitting to measurable drops in cerebral blood flow, which short movement breaks prevented. Experts emphasize these findings complement — rather than replace — structured exercise, targeting the distinct physiological harms of prolonged stillness.