Reuters (10/23, Rapaport) reports that research suggests that individuals who regularly sleep less than six hours each night may have a higher likelihood of developing metabolic syndrome.  Metabolic syndrome is a name for five common risk factors that increase the chances of developing heart disease: a large waistline (apple-shape body), high fat content (triglycerides) in the blood, low good cholesterol blood levels (HDL),high blood pressure, and high blood sugar . A team of University of South Korea researchers tracked about 2,600 adults for more than two years and discovered those getting less than six hours of sleep per night had a 41% higher risk of developing metabolic syndrome than those sleeping between six and eight hours per night. The findings were published in Sleep Medicine.