Day 6 In Polyphasic Sleep ChallengeApril 2, 2018 in Polyphasic Sleep Challenge tagged challenge / polyphasic sleep / sleep / sleep cycles by Armin Day Six in Polyphasic Sleep ChallengeSixth day in Polyphasic Sleep Challenge. Drowsiness has finally got me and I’m having very difficult times to keep myself awake.Watch the video and find out more. [adzbuzzer]Read more about the challenge itself.