How more exercise stops type 2 diabetes, by study

Although exercise is already known to reduce type 2 diabetes risk, a new study brings additional detail. Using data from more than one million participants across four continents, researchers measured the precise benefits of exercise.

As far as exercise and diabetes are concerned, the more, the better.

The researchers found that any exercise is beneficial in staving off diabetes, but individuals who exceeded the 150 minute recommendation saw the greatest benefits.

According to the analysis, published this week in the journal Diabetologia, cycling or walking briskly for 150 minutes each week cuts the risk of developing type 2 diabetes by up to 26 percent.

Those who exercise moderately or vigorously for an hour each day reduced their risk by 40 percent. At the other end of the scale, for those who did not manage to reach the 150 minutes target, any amount of physical activity they carried out still reduced the risk of type 2 diabetes, but to a lesser extent.

With the global number of type 2 diabetes cases expected to hit 592 million by 2035, all knowledge of how this disease might be managed is vital.

The risk factors for type 2 diabetes (the most common version of diabetes) are well known.

Being overweight or obese, high blood pressure, abnormal cholesterol and triglyceride levels, and inactivity are all known to play a substantial role. All of the above can be managed, at least in part, by exercise.

The new study, published this week in the journal Diabetologia, takes a deeper look at the role of exercise in the development of type 2 diabetes. It is the most in-depth study to examine exercise independent from other influential factors, such as diet. The conclusions from the report are clear: “This research shows that some physical activity is good, but more is better.”

Currently, physical activity guidelines in the United States (U.S.) and the United Kingdom recommend 150 minutes of moderate activity or 75 minutes of vigorous activity per week; this could include cycling, walking, or sports. However, according to the U.S. Centers for Disease Control and Prevention (CDC), fewer than 50 percent of American adults meet these recommendations.

The current study was a result of collaborative work between two institutions – University College London and the University of Cambridge, both of which are based in the U.K. Data from more than one million people was collated. In all, the team analyzed 23 studies from the U.S., Asia, Australia, and Europe.

Thanks to the vast amount of information available to them, the investigators were able to strip out the effects of exercise and examine them independently of other behavioral factors, such as diet and smoking. This is in contrast to earlier work that has not been able to isolate the impact of physical activity alone.

Lead author Andrea Smith said: “Our results suggest a major potential for physical activity to slow down or reverse the global increase in type 2 diabetes and should prove useful for health impact modeling, which frequently forms part of the evidence base for policy decisions.”