Some astral travel techniques actually have that as a requirement. So, the instructions are to first relax, then go to the sleep paralysis stage, then use it to exit. I personally haven’t been able to do astral travel, and i haven’t succeeded in using sleep paralysis to astral travel. Some states that we don’t use the sleep paralysis stage, but wait for it to pass, then we exit. So maybe the way i’m doing it is wrong.
This answer originally appeared on this Quora question on Astral Projection.