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A new paper suggests that it takes far less exercise than was previously thought to lower blood sugar after eating.
By Rachel Fairbank
Walking after a meal, conventional wisdom says, helps clear your mind and aids in digestion. Scientists have also found that going for a 15-minute walk after a meal can reduce blood sugar levels, which can help ward off complications such as Type 2 diabetes. But, as it turns out, even just a few minutes of walking can activate these benefits.
In a meta-analysis, recently published in the journal Sports Medicine, researchers looked at the results of seven studies that compared the effects of sitting versus standing or walking on measures of heart health, including insulin and blood sugar levels. They found that light walking after a meal, in increments of as little as two to five minutes, had a significant impact in moderating blood sugar levels.
“Each small thing you do will have benefits, even if it is a small step,” said Dr. Kershaw Patel, a preventive cardiologist at Houston Methodist Hospital who was not involved in the study.
Very light walking reduces blood sugar levels.
In five of the studies that the paper evaluated, none of the participants had pre-diabetes or Type 2 diabetes. The remaining two studies looked at people with and without such illnesses. Participants were asked to either stand or walk for two to five minutes every 20 to 30 minutes over the course of a full day.
All seven studies showed that just a few minutes of light-intensity walking after a meal were enough to significantly improve blood sugar levels compared to, say, sitting at a desk or plopping down on the couch. When participants went for a short walk, their blood sugar levels rose and fell more gradually.
For people with diabetes, avoiding sharp fluctuations in blood sugar levels is a critical component in managing their illness. It’s also thought that sharp spikes and crashes in blood sugar levels can contribute to developing Type 2 diabetes.
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