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Exercising harder -- and shorter -- can help Type 2 diabetes
Date:12/12/2011

Bethesda, Md. (Dec. 12, 2011)Regular exercise has proven benefits in preventing and treating type 2 diabetes, but many patients find it tough to meet the American Diabetes Association guidelines of 150 minutes of moderate to vigorous exercise a week. A new study, conducted by researchers at McMaster University, suggests that there could be a better way. In a small proof-of-principle study in eight type 2 diabetes patients, the researchers found that exercising at a very high intensity, but for a mere 30 minutes a week within a 75 minute total time commitment, lowered overall blood sugar concentrations, reduced post-meal blood sugar spikes, and increased skeletal mitochondrial capacity, a marker of metabolic health. The findings suggest that exercising harder, but in a significantly shorter amount of time, could provide benefits similar to longer, but more moderate, activity.

The article is entitled "Low-Volume High-Intensity Interval Training Reduces Hyperglycemia and Increases Muscle Mitochondrial Capacity in Patients with Type 2 Diabetes." It appears in the current edition of the Journal of Applied Physiology, published by the American Physiological Society.

Methodology

Working with eight type 2 diabetic volunteers recruited through local diabetes clinics, information sessions, and advertising, the researchers gave each individual a baseline exam to test blood sugar over a 24-hour period, assess fitness levels, and take biopsies of thigh muscle to measure muscle mitochondrial protein levels. For the next two weeks, the researchers showed up for a total of six supervised training sessions. Each session involved pedaling on a stationary bike for 10 repetitions of 60 seconds apiece at about 90 percent of maximal heart rate, interspersed with 60 seconds of rest, capped by a short warm-up and cool-down. Each entire exercise session lasted 25 minutes of which only 10 minutes was spent performing vigorous intensity exer
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Contact: Donna Krupa
dkrupa@the-aps.org
American Physiological Society
Source:Eurekalert

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