I don't have huge sleep decreases in hypomania either. I average around 7 hrs when manic, 9 hours when "normal" and 12+ hours when depressed. Yes, I know, I have really high sleep requirements, lol. Seriously, if I get under 4 hours, my body protests. I get severe nausea, vomiting, fatigue that rivals what I experience when depressed, chills...so I know better than to cut out sleep, even when I'm tempted to. Thankfully, I very rarely have any problem staying asleep once I get to sleep.

I've heard of others with bp who don't stop sleeping in mania, but I think that we're relatively rare. Of course, bp is such a multifaceted disorder, and it presents itself uniquely in each patient. So we can't look at any one symptom of mania or depression and say to someone "oh, well you don't have that so you're clearly not bipolar."