Study Explores Sleep and Diabetes Risk

New research shows how getting too little sleep, at erratic times, may cause changes in the body that increase the risk of weight gain and diabetes. The study was done with 21 volunteers who spent 6 weeks living in a laboratory. After a period of normal sleep, they spent the next 3 weeks getting an average of 5.6 hours a night. They were allowed to sleep only at varying times of the day or night. This pattern was designed to imitate rotating shifts or jet lag. During this time, people’s blood sugar went up after meals — in some cases, to pre-diabetic levels. This occurred because the pancreas produced less insulin. Metabolism fell by 8%. People were kept on a diet to avoid weight gain. But researchers said without the diet people could have gained 10 to 12 pounds a year under similar conditions. The journal Science Translational Medicine published the study.