Study: Sleeping With Lights on Linked to Weight Gain in Women

Sleeping with lights on has been linked with an increased risk of weight gain and obesity, said a new study published in the medical journal JAMA Internal Medicine. Dale Sandler, a senior investigator at the National Institute of Environmental Health Sciences in North Carolina and senior author of the study, explained that sleeping with a television or light on in the room was associated with a 17% higher risk of gaining five kilograms over a five-year period among women, with a 22% chance of becoming overweight and a 33% chance of becoming obese.