If you spend most of your working day sitting at a desk, you have probably heard that getting up and moving regularly is good for your health.
A new study from the University of Otago—Ōtākou Whakaihu Waka now suggests exactly how often you should do it. According to the research, taking a short walking break every 20 minutes may be the best way to lower blood sugar and insulin levels after eating.
Modern life involves much more sitting than in the past. Many people work on computers for hours, drive instead of walking, and relax by watching television or using mobile devices.
Although these activities seem harmless, sitting for long periods without moving has been linked to a higher risk of heart disease, type 2 diabetes, obesity, and some types of cancer. Scientists believe that staying still for too long slows down the body’s ability to process sugar and fat, which may gradually damage health.
Blood sugar is the amount of glucose in the bloodstream. After eating, blood sugar naturally rises. The body releases insulin, a hormone that helps move glucose from the blood into cells where it is used for energy.
When people sit for long periods, their muscles remain inactive, making it harder for the body to use glucose efficiently. Over time, this can contribute to insulin resistance and increase the risk of type 2 diabetes.
The new study, published in the journal Obesity Reviews, reviewed 53 previous scientific studies that investigated how activity breaks affect blood sugar and insulin. Instead of carrying out one experiment, the researchers combined evidence from many high-quality studies to identify the most effective pattern.
Lead author Dr. Jen Gale, who completed the research as part of her PhD in the Department of Human Nutrition, said the evidence clearly showed that breaking up sitting with regular movement benefits health. Among all the timing strategies examined, taking a brief walking break every 20 minutes produced the largest reductions in blood sugar and insulin after meals.
The researchers also found that the benefits appeared to be even greater for people living with type 2 diabetes and for people with larger body sizes. These groups often have more difficulty controlling blood sugar, so frequent movement may provide extra help.
Although the review did not determine the perfect length of each break, most of the studies included walking breaks lasting only two to three minutes. This means people do not need long exercise sessions throughout the day.
Simply standing up, walking around the office, climbing a few stairs, or taking a short stroll may be enough to make a meaningful difference.
Senior author Dr. Meredith Peddie noted that many people feel taking a break every 20 minutes sounds difficult. Many workers say every 30, 45, or even 60 minutes seems more realistic. However, the evidence suggests those longer intervals are less effective at lowering blood sugar.
Walking produced the strongest results, but researchers say other forms of light movement may also help. Activities such as gentle stretching or even dancing could provide similar benefits, although more research is needed because these activities have not been studied as carefully.
The researchers also point out that most of the studies were carried out under carefully controlled laboratory conditions. Real life is much busier, and many jobs make frequent movement difficult. Future studies will focus on practical ways to help people include regular activity breaks in their everyday routines.
This research strengthens the growing evidence that small lifestyle changes can improve long-term health. Because the study reviewed 53 previous studies, its conclusions are stronger than those from a single experiment.
However, most evidence comes from laboratory settings, so researchers still need to learn how people can realistically follow these recommendations at work. Even so, taking a short walk every 20 minutes appears to be a simple, low-cost habit that could help improve blood sugar control and reduce the risk of chronic disease.
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Source: University of Otago—Ōtākou Whakaihu Waka.
