I want to know about the first 90-minute period before the f

[Cobalt Storm]

irst REM period. Can it be shortened?

[fennecgirl]

You can't shorten it, as far as I know. Even if you did manage to shorten it somehow, there's still the fact that the first REM period lasts only a few minutes. If you're going to WILD, you're better off either combining it with WBTB or attempting it during a nap.