Lack of sleep could increase the risk of obesity and diabetes, researchers say.

A new study found that irregular sleep patterns can slow down an individual's metabolism, which can contribute to weight gain.

Researchers at Brigham and Women's Hospital in Boston also found disrupted sleep raises blood sugar levels, which could lead to diabetes.

Chronic sleep problems are common in the United States. Government research has shown that up to 40 percent of adult Americans don't get enough sleep.

A lack of sleep has also been associated with heart attacks and stroke.