I read this on one of the WILD tutorials here: 'Afternoon naps are also a good time to make an attempt, since most people have a REM cycle in the late afternoon or early evening.'

Just wondered if anyone can elaborate a bit on this... By REM cycle, does that mean that one can often naturally enter an REM cycle at this time, provided you had some sleep the night before?
I generally nap at 7:30pm (Can't go any earlier, really, as dinner and letting my chinchilla's out for exercise would interfere) and I don't think they come on quickly, although I don't know if this isn't just a matter of poor recall.

What is the best duration to nap to begin entering an REM cycle if you've had a good solid sleep the night before? And apologies for the multiple questions in one thread.