11. Sleep and obesity are locked in a vicious cycle
22 per cent is the number of extra kilojoules consumed by men who slept for four hours versus eight hours in a 2010 study published in The American Journal of Clinical Nutrition.
Neither the well-slept nor under-slept participants said they felt hungrier or enjoyed the foods more, yet the tired group consumed substantially more kilojoules during subsequent meals.
12. 45 minutes
45 minutes is the amount of time each member of a group of 25 insomniacs spent listening to soothing music before bedtime every night. Their REM sleep significantly improved compared to 25 matched insomniacs who went without.
13. Scientists can see your dreams
Using MRI and an algorithm, doctors in Japan inferred what their test subjects were dreaming about from their brainwaves.
Dreaming has been thought to be a private experience, accessible only to the person experiencing the dream,” says Yukiyasu Kamitani, of Kyoto’s ATR Computational Neuroscience Laboratories.
But his lab has taken a glimpse behind the veil by assembling a database of commonly dreamt images (cars, buildings, men, women, food and even furniture) and correlating them with three participants’ brain activities, testing them more than 200 times each.
With this data, Kamitani was able to guess what was dreamt 60 per cent of the time. It seems there’s no escape from our work and personal stresses: most dreams were about the office or the family.