Habitual Shortened Sleep and Insulin Resistance: An Independent Relationship in Obese Individuals

Non-diabetic, overweight/obese participants who were insulin-resistant or insulin-sensitive underwent an oral glucose tolerance test.  Individuals reporting short habitual sleep duration (<7 hours/night) were more likely to be insulin-resistant than insulin-sensitive.

http://www.ncbi.nlm.nih.gov/pubmed/23849514