When you're really tired, getting through the day is enough of an effort to warrant at least a small trophy. And if you haven't been sleeping well for days -- or weeks or months -- you might feel like you're operating in full-on zombie mode.
Unfortunately, sleeplessness is one of the most common symptoms of perimenopause. With the withdrawal of estrogen, the brain sometimes releases the chemicals responsible for the fight-or-flight response [source: Booth]. That rush is necessary for escaping mountain lions, but less helpful for remaining blissfully asleep.
Late-night/wee-hours prowling around the house can be calmed with hormone replacement therapy (HRT) -- but it's not for everyone. Sleeping pills can help you nod off, but not all of them leave you feeling rested, either. Pick up some melatonin supplements, exercise daily and try meditation to see if you can get your snooze back.
Next, another reason that sleeping through the night requires more exertion than you'd like.