Sleep is a seemingly unproductive natural process that is observed across a wide range of species including worms, flies, and vertebrates such as humans1. Long term sleep deprivation has been linked to an almost inexhaustible list of diseases like obesity, cardiovascular diseases, cognitive impairment, and premature death, just to name a few2,3. Furthermore it also has a direct impact on relative levels of energy throughout the day4. Sleep is a multifactorial process which cannot be simply measured by duration, but must take into consideration other factors like patterning and quality3. Interestingly to note, a lack of sleep has also been found to increase snacking and the consumption of energy-rich foods. Overall there is accumulating evidence that a sleep duration of 7-8 hours per night in adults is associated with the maintenance of good health4.
1. Weber, F. & Dan, Y. Circuit-based interrogation of sleep control. Nature 538, 51–59 (2016).
2. Moller-Levet, C. S. et al. Effects of insufficient sleep on circadian rhythmicity and expression amplitude of the human blood transcriptome. Proceedings of the National Academy of Sciences 110, E1132–E1141 (2013).
3. Zhou, J., Kim, J. E., Armstrong, C. L., Chen, N. & Campbell, W. W. Higher-protein diets improve indexes of sleep in energy-restricted overweight and obese adults: Results from 2 randomized controlled trials. American Journal of Clinical Nutrition 103, 766–774 (2016).
4. Chaput, J.-P. Sleep patterns, diet quality and energy balance. Physiology & Behavior 134, 86–91 (2014).
5. Sun, J., Kang, J., Wang, P. & Zeng, H. Self-relaxation training can improve sleep quality and cognitive functions in the older: A one-year randomised controlled trial. Journal of Clinical Nursing 22, 1270–1280 (2013).
6. Peuhkuri, K., Sihvola, N. & Korpela, R. Diet promotes sleep duration and quality. Nutrition Research 32, 309–319 (2012).