You go to bed early and still don’t understand how you are not energized and refreshed in the morning. It doesn’t make sense how after eight hours of sleep you are still tired. In most cases, you will discover there are things you do before bedtime or during bedtime that sabotage your rest. That said, it could also be due to a bad mattress, improper ventilation, and lighting or phone use before bed. Here are five possible reasons why you are still tired after a proper night of sleep.