Do you feel tired and groggy in the morning even though you had eight hours of sleep? Well, maybe you’re not sleeping at the right times. A doctor has gone viral on TikTok after explaining that not all eight hours are the same, and you must sleep during the ‘golden window’ for the best rest. ‘Golden window’ of sleepDr. Sermed Mehzer responded to a video in which a man said that going to bed at 2am and waking up at 10am is not the same as going 10pm to 6am. “That’s right, not all eight-hour sleeps were made equal,” he said. “One of the huge reasons for this is because there’s a golden window of…