Hey. I am currently preparing me for my future work with 2x1.5h sleep naps during the day. Do i need to put an alarm clock for this 90-min sleep, or do i wake up after this? Tried earlier the 20-min and it works pretty well with the "bell" at the end :)

Thanks,
Gregs
Polyphasic sleep? Or is this in addition to getting 8 hours at night?
D. gregory