Cycle Uberman. Cycle Test. Cycle Everyman. Cycle Dymaxion. Alternative Sleep Cycles: You Don’t Really Need 6-8 Hours! Most people only think that there is one way to sleep: Go to sleep at night for 6-8 hours, wake up in the morning, stay awake for 16-18 hours and then repeat.
Sleep is for the weak ! ^^ (I decided to switch on Everyman cycle) – zardorik
Actually, that is called a monophasic sleep cycle, which is only 1 of 5 major sleep cycles that have been used successfully throughout history.
The other 4 are considered polyphasic sleep cycles due to the multiple number of naps they require each day.