Several studies by top neuroscientists have proved that napping has excellent benefits for the mind. 30 - 40 minute naps can increase cognitive performance and enhance memory, which is a good reason why power naps should be introduced into more workplaces - a practice which is becoming increasingly popular in Japan. Of course there is a big difference between power naps and sleeping until noon every day, so dont try and use the Its making me smarter excuse on your boss when you turn up late for the tenth time in a row. And try and limit them to one a day, any more and youll start to look like you have a medical condition.