Polyphasic Sleep Challenge vol 2 Second WeekMay 2, 2018 in Polyphasic Sleep Challenge tagged challenge / polyphasic sleep / sleep cycles by Armin It’s day 15 (35) in Polyphasic Sleep Challenge vol 2 and it’s time to give some feedback about the past week. Finally, I see the light at the end of the tunnel 🙂 [adzbuzzer]Read more about the challenge itself.