A study found that women who slept too little - five or fewer hours per night - are at risk of major weight gain. Light sleepers weighed more on average than those who slept for seven hours. http://www.dailymail.co.uk/pages/live/articles/news/news.html?in_article_id=387437&in_page_id=1770 i absolutely do not stay in bed longer than 5 hours a night. at last i have the answer to my appalling weight gain. nothing to do with stuffing my face!