i've heard that this can be dangerous over a long period of time because 1) your muscles rebuild when you are in deep sleep which takes a few hours to get into, and 2) it can mess up your short term memory because you need deep sleep for that too
Anybody else back me up on this?
you can die if you don't get enough REM sleep. but according to this article, if you get into the right cycle of half-hour naps, it's all REM and you can survive for quite a while.