Polyphasic Sleep Challenge vol2 Third WeekMay 10, 2018 in Polyphasic Sleep Challenge tagged challenge / polyphasic sleep / sleep cycles by Armin Day 22 (42) in Polyphasic Sleep Challenge which means it’s already 3 weeks with Vol 2. Not much has changed and I will make few changes again to see will I have any affect with them. [adzbuzzer]Read more about the challenge itself.