According to the Intermittent Fasting site, 8 hours of sleep is part of your fasting:<p><a href="http:&#x2F;&#x2F;antranik.org&#x2F;intermittent-fasting&#x2F;" rel="nofollow">http:&#x2F;&#x2F;antranik.org&#x2F;intermittent-fasting&#x2F;</a><p>This groks with everything I&#x27;ve learned about dieting and exercise. Some people like to work out in the afternoon because their bodies are at peak-warm-up. While I like to exercise first thing in the morning because my body has to find energy in my fat stores after fasting through eight hours of sleep.<p>Try weighing yourself before bed and when you wake up. You&#x27;ll find you lose a pound or more for exhaling carbon in your sleep:<p><a href="http:&#x2F;&#x2F;www.npr.org&#x2F;sections&#x2F;krulwich&#x2F;2013&#x2F;06&#x2F;19&#x2F;193556929&#x2F;every-night-you-lose-more-than-a-pound-while-youre-asleep-for-the-oddest-reason" rel="nofollow">http:&#x2F;&#x2F;www.npr.org&#x2F;sections&#x2F;krulwich&#x2F;2013&#x2F;06&#x2F;19&#x2F;193556929&#x2F;ev...</a><p>Here&#x27;s how it works for me: go to bed at 9, get up at 5am, skip breakfast, and put off lunch until 1pm (drink lots of tea during the day). What I&#x27;ve found is that I can&#x27;t eat enough calories between 1pm and 9pm to gain weight.<p>I think these researchers are on to something. Different dieting techniques work for different people, so it&#x27;s good to have lots of options.