[QUICK NAP]1 HOURS! Whale Sounds, Ambient Underwater Sound | Relaxation | Stress Relief | Study.

Headphones For Better Experience! Perfect for Nap, relaxation, studying, and stress relief. How To Get A Good Nap Without Feeling Groggy : you should follow the 30-90 rule What is the 30-90 rule? The 30-90 rule is a guideline for taking a good nap without feeling groggy afterward. It states that naps should last 30 minutes or less — OR be at least 90 minutes long, in order to improve physical health and cognitive performance. Does it work? The answer has to do with the science of sleep and the nature of our brains. For the first 30 minutes of your sleep, you are in light sleep. Awakening from this phase will leave you feeling refreshed and more alert. If you sleep for longer than 30 minutes but less than 90 minutes, you will likely wake up during a deep sleep phase. This causes grogginess. Naps of longer than 90 minutes often allow you to complete your sleep stages, resulting in the maximum amount of beneficial impact. The benefits of a (well-timed) nap: 1.Improved concentration and memory 2.Relaxation, lower stress levels 3.Lower blood pressure 4.A better mood 5.Quicker reaction time (Think: Braking quickly in the car; trying to catch something that’s fallen)