It might feel like pressing the snooze button in the morning gives you a little bit of extra rest to start your day, but the truth is that it does more harm than good.
That's because when you first wake up, your endocrine system begins to release alertness hormones to get you ready for the day. By going back to sleep, you're slowing down this process. Plus, nine minutes doesn't give your body time to get the restorative, deep sleep it needs.
This isn't to say you should cut back on sleep. As Arianna Huffington discusses in her TED talk, a good night's sleep has the power to increase productivity, happiness, smarter decision-making, and unlock bigger ideas. The trick for getting enough sleep is planning ahead and powering down at a reasonable time.