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Uberman consists of 6 naps from 20 to 30 minutes long that must be taken at consistent intervals throughout the day. Uberman has the hardest sleep patterns to implement and it’s also one of the least flexible. If you miss a nap, you’re likely to encounter strong sleep deprivation until your next nap. This is a sleep pattern that really stretches the limits, and you might never feel 100%, but it is possible and it has been done.