There’s no debating that we need sleep. It's crucial for our mental and physical health, quality of life, and overall safety, according to the National Heart, Lung, and Blood Institute. Proper sleep not only leaves you feeling refreshed and ready to take on the day, it improves learning, helps the heart and blood vessels repair themselves, promotes a healthy balance of hunger hormones, and aids the immune system.
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.