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Metabolic Syndrome: How Much Exercise?

Moderate Exercise Can Curb Metabolic Syndrome Symptoms, Study Shows
WebMD Health News
Reviewed by Louise Chang, MD

Dec. 17, 2007 -- You don't have to run a marathon to curb the symptoms of metabolic syndrome (a condition which makes diabetes and heart disease more likely). Moderate exercise will do.

So say Duke University's Johanna Johnson, MS, and colleagues.

"Our motto in this group, after looking at all the data, is that some exercise is always better than none, and more is better than less," Johnson tells WebMD. She's a clinical research coordinator at Duke University Medical Center.

Metabolic Syndrome Study

Johnson's team studied 334 adults with metabolic syndrome.

People with metabolic syndrome have at least three of the following risk factors:

  • Large waist
  • Low levels of HDL ("good") cholesterol
  • High levels of triglycerides (a type of blood fat)
  • Elevated blood pressure
  • Elevated glucose (blood sugar) levels after fasting

When the Duke study started, participants were 40-65 years old, overweight or obese, and physically inactive. None had a history of heart disease, diabetes, or high blood pressure.

Exercise and Metabolic Syndrome

The researchers split participants into four groups:

  • Low amount of moderate exercise (equivalent to walking about 12 miles per week)
  • Low amount of vigorous exercise (equivalent to jogging about 12 miles per week)
  • High amount of vigorous exercise (equivalent to jogging nearly 20 miles per week)
  • No exercise

Participants in the exercise group didn't plunge into their workouts. They spent two to three months working up to their assigned exercise level to avoid injuries.

After that, they followed their exercise assignment for six months. They wore heart rate monitors so that the researchers could monitor their progress.

The exercisers had access to a treadmill, elliptical machine, or stationary bike at a gym. Some people in the moderate exercise group took brisk walks in their neighborhood.

Participants were free to tailor their exercise time to their schedules, as long as they met their weekly exercise goal. For most people in the moderate exercise group, that worked out to three hours a week spread over four or five weekly sessions.

Participants were asked not to diet or change their eating habits during the study.

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