Is there any harmful effects for sleeping early, around 9pm? and waking up at 3am? daily. Will it invert your biological clock and cause you to be more sleepy in the day?
Most of my A level papers are at 8am in the morning. I'm not sure if its true that by waking up at 3am, i would use up some of my energy and not perform as compared to waking up at 7 and going fresh to take the exam.