Caffeine naps
This type of nap occurs when you take a cup of coffee, espresso, or tea. It occurs when you sleep immediately after taking any of the substances. It must also be done for 20-25 minutes. When you wake up from your nap, you’ll feel more refreshed and energized. This occurs because the caffeine starts to work when you wake up. According to a study done in 2010, caffeine functions by stopping the effects of adenosine. Adenosine is a compound that accumulates during the day and enhances sleepiness. The adenosine receptors in your brain are blocked to prevent tiredness or fatigue [2].