Most experts agree that the ideal time to wake up is between 6 and 8 am. This is because this is when your body naturally starts to produce cortisol, which helps to regulate your energy levels and metabolism. Waking up earlier than 6 am can be disruptive to your natural sleep cycle and may make you feel groggy and tired throughout the day. On the other hand, sleeping past 8 am can also have negative consequences. Research has shown that people who sleep in on weekends are more likely to suffer from depression and anxiety.