Why does WILDing increase one's heart rate? A few nights ago I seemed to be getting there, I just started to get sleep paralysis but then my heart started pumping like I'd just taken furious excersize. I tried to persevere but I began to feel uncomfortable so I wriggled my toes (I can't have been that paralysed yet) and snapped out of the WILD attempt.

Does heart rate always increase upon falling alseep, but normally you wouldn't notice because you'd be unconcious by then?