Night owls have a higher BMI, larger waists, more hidden body fat and are almost 50% more likely to develop type 2 diabetes (T2D) than those who go to bed earlier, shows new research. To find out more, Dr. van der Velde and colleagues studied the association between sleep timing, T2D and body fat distribution in more than 5,000 individuals. The analysis involved participants with a mean age of 56 years and mean BMI of 30 kg/m2. The participants were then divided into three groups: early chronotype, late chronotype and intermediate chronotype. The participants were followed-up for a median of...