2. It helps boost your immune system when you’ve had a bad night’s sleep. Bye, niggling cold. A study in Journal of Clinical Endocrinology & Metabolism found a 30-minute nap can reverse the hormonal impact of a night of poor sleep. "This is the first study that found napping could restore biomarkers of neuroendocrine and immune health to normal levels," said study co-author Dr Brice Faraut.
3. It improves memory. Neuropsychologists at Saarland University found that even a short sleep lasting 45 to 60 minutes produces a five-fold improvement in info retrieval from memory. In their study, participants who had a nap were able to remember word pairs better than those who had watched a DVD instead. Seems a short sleep wins over your box set of Suits.
4. It can help your heart. A Greek study found that midday naps can lower blood pressure levels and may probably also decrease the number of antihypertensive medications. Lunchtime siesta, anyone?