Originally Posted by Burns
I don't know about you, but if I sleep TOO long (>10 hrs), I feel extremely groggy all day. But I require AT LEAST 7, if not 8 hours of sleep or I'm pretty useless.
You wake up groggy because you woke up during Deep Sleep. You would have felt alert if you woke up during Rem.

But what about AGE?

Obvisouly if you are young you should DEFINITLY get 10-12 hours of sleep. Adults don't requrie as much sleep (6-8 hours), but I don't think more sleep is bad. Put it this way. More Sleep = More Lucid Dreams!