Multiple, brief, snack-sized portions of exercise may control blood sugar better than a single, continuous workout, according to new research that adds to a growing body of evidence about the wisdom of spreading exercise throughout the day. For some time, scientists have been intrigued by the idea that breaking up exercise into repeated, short sessions might be as beneficial as longer workouts, and most related experiments to date have been encouraging. In a 2012 study of people with symptoms of hypertension, for instance, volunteers controlled their blood pressure better throughout the day if they completed three 10-minute walks rather than one 30-minute stroll. But little research in this area had been directed at people with blood sugar problems. So, for the new study, published this month in Diabetologia, scientists in New Zealand recruited nine adult men and women with medically confirmed insulin resistance, a common precursor of Type 2 diabetes. The scientists checked their volunteers’ general health, aerobic capacity and blood sugar responses to food. As would be expected, the volunteers developed severely elevated blood sugar after they ate, an unhealthy condition that continued for hours.

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