Study Links Weight Gain in<br />Women to Sleeping With Lights On According to a new study published in<br />JAMA Internal Medicine, there may be link between<br />increased risk of weight gain and certain sleeping habits. The study, called the “Sister Study,” was conducted<br />between 2003 and 2009 with 43,722 women between<br />the ages of 35 to 74 in the United States. It required the women to log their sleeping habits,<br />such as sleeping with a light or television on,<br />as well as their body mass index (BMI). Throughout the five-year period, researchers<br />found that light exposure during sleep was<br />associated with various forms of weight gain. Women had a 17% chance of gaining<br />five kilograms, a 22% chance of becoming<br />overweight and a 33% chance of becoming obese. According to senior investigator Dale Sandler,<br />“the more light in the room the stronger the association.” Dale Sandler, via CNN
