Re: How much stage 4 sleep?
My sleep specialist MD told me today that they no longer regard
a separate stage 4 sleep but rather consider stage 4 and stage 3
as the same so on most modern studies only stage 3 is shown.
Surprised me to hear this. And he also told me that stage 3 tends
to decrease with age, which didn't help me feel any better. So
don't feel bad if no stage 4 shows up for you, it's now stage 3.