Too Much Light While Sleeping , Could Be Hurting Your Health.<br />CNN reports that a study suggests sleeping while surrounded <br />by dim lighting could cause a rise in blood sugar and <br />increase heart rates in young and healthy people.<br />The study reportedly analyzed 20 healthy participants in their 20s, tracking their sleep for two nights in a sleep lab.<br />Researchers say on night one, the room <br />in which participants slept was so dark, "you wouldn't be able to see much, if anything, when your eyes were open.".<br />We recorded their breathing, their heart rate, their EKG, <br />and we also drew blood from them to measure melatonin levels while they were sleeping. , Dr. Phyllis Zee, director of the Center for Circadian <br />Sleep Medicine, Northwestern University, via CNN.<br />On night two of the study, some participants stayed in the dark, while others slept under <br />dim light equal to "a very, very dark, cloudy day or street lights coming in through a window.".<br />The study found that even such <br />minimal amounts of light were <br />negatively affecting participants, .<br />creating deficits in slow-wave <br />and rapid eye movement sleep.<br />Researchers say the light levels <br />on night two did not affect <br />melatonin levels in participants.<br />though their heart rates rose, insulin resistance increased and their nervous systems had fallen out of balance.<br />Experts say for the healthiest sleep, <br />turn off the lights and start using a comfortable sleep mask.<br />Experts say for the healthiest sleep, <br />turn off the lights and start using a comfortable sleep mask.<br />I think the strength of the evidence is that you should clearly pay attention to <br />the light in your bedroom. , Dr. Phyllis Zee, director of the Center for Circadian <br />Sleep Medicine, Northwestern University, via CNN
