monkey_brain wrote:Sleep debt in the presence of what should be adequate sleep amounts indicates a possible sleep pathology.
"Sleep debt" implies there's an ideal amount/type of sleep; and associating sleep problems with pathology is really pushing it.
Can I take the middle way here?
Johnny has mentioned sleeping 8 - 8.5 hrs/night and still being sleepy or able to sleep very easily.
'Sleep debt' is simply not having had 'enough' sleep according to one's personal needs. Some people are fine with 5, others (I know some in my own family) accumulate a genuine sleep debt if they don't average 9 - 9.5.
So it's perfectly possible the OP does have a sleep debt but no 'sleep pathology', even if he is really sleeping well for those 8 8.5 hours.
It is also possible (but less likely, IMO) that there is some interruption to Johnny's sleep without which 8.5 would be enough. It might be environmental (nearby factory starting up at 4 a.m.?) or a health issue.
The simplest thing to do is probably just sleep longer each night and see what happens.