The effects of sleep deprivation on your health

Sleep: The Effects of Sleep Deprivation on Human Health
Diet & Nutrition Education Lifestyle Advice Sleep

Written by Cliff Harvey, Nuzest Product Formulator,  Registered Clinical Nutritionist, Researcher and Author (ND, Dip.Fit, PhD(c))

Until recently, sleep was perhaps the most under-recognised piece of the health puzzle. It’s not that it was completely ignored, but the conversation generally revolved mostly around diet and exercise. Now, we are beginning to see, more and more, the enormous role that healthy sleeping patterns play in our overall health and performance.

What happens when we sleep?

When we sleep, our body disables sensory and muscle activity and we enter an altered state of consciousness.

During sleep, the body accelerates its recovery by building tissue and restoring immune and hormone functions and removing toxins from the brain and nervous system by way of a rhythmic ‘washing’ of the brain by the glymphatic (glial + lymphatic) system.

When we are asleep, we go through several phases of sleep including those categorised by rapid eye movement (REM), and non-REM sleep.

Within minutes we enter stage one sleep, characterised by alpha and theta brain waves. After several minutes of light, stage one sleep, we enter stage two. And ‘deep sleep’ (also called slow-wave sleep) involves stage three and four. In these stages, muscle activity is inhibited, and it is harder to awaken. About 90 minutes after falling asleep we then enter REM sleep characterised by rapid, jerking movements of the eyes. In this phase, the brain reactivates (most dreaming occurs during REM sleep) and this plays an important role in learning and memory, as the brain processes and organises information during this phase.

Sleep Phases

How much sleep do we need

The quality of a person’s sleep (including adequate REM and deep sleep) is also extremely important. While there is no consensus on exactly how much REM and deep sleep we require, deep sleep should account for at least 13% of total sleep duration, while REM sleep typically accounts for at least 20% of sleep in healthy people2.  

Note: There can also be significant variations between people, and while most of us probably do best around the norms suggested above, it is known that genetic variability between people exists and some thrive on greater or lesser sleep times and different sleep patterns3.

The effects of sleep deprivation on health

Both short and long sleep durations are associated with poorer health and increased mortality risk4-6, and while we need to be aware the correlation does not always equal causation, the evidence is consistent enough that it is highly likely that poor sleep can precipitate poor health. Conversely, illnesses and health conditions can affect sleep (through physical pain and discomfort or mental and emotional anguish) but conversely, leading to a vicious cycle.

Reviews of the evidence have suggested a link between poor sleep (either length or quality) and a range of conditions, including:

  • Chronic pain and arthritis7

  • ADHD8

  • Heart disease and stroke9-10

  • Reduced cognition and brain health11-18

  • Dementia, Alzheimer’s and Parkinson’s disease18-20

  • Diabetes21-22

  • Increased inflammation23

  • Depression, bipolar disorder, and anxiety24-28

  • Reduced mood29

  • Multiple sclerosis (MS)30

  • Weight gain and obesity31-33

 

Interestingly, loss of sleep is likely to also result in a lesser desire to exercise and eat well.34-35  It has, for example, been shown that partial sleep deprivation can result in people eating more, choosing to eat fattier foods that are lower in protein, 36 and snack and drink more soda.37 This relationship is bidirectional, as a poor diet also likely leads to poorer sleep…and so, the cycle continues!35 On the other hand, getting adequate sleep is associated with a higher intake of fruits and vegetables.37

Sometimes sleep deprivation is unavoidable, however when it does occur it is important that we try our best to make healthy food choices in an effort to break the bidirectional poor sleep-poor diet cycle! If you feel that you are struggling to meet your nutrition needs through diet, you may like to consider a multinutrient supplement such as Nuzest Good Green Vitality as ‘nutritional insurance’ to help fill the nutritional gaps in your diet.

Nuzest recently spoke to five health experts regarding their top tips for achieving a good night’s sleep. Read what they had to say…

References

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  2. Altevogt BM, Colten HR. Sleep disorders and sleep deprivation: an unmet public health problem: National Academies Press; 2006.

  3. Madrid-Valero JJ, Rubio-Aparicio M, Gregory AM, Sánchez-Meca J, Ordoñana JR. Twin studies of subjective sleep quality and sleep duration, and their behavioral correlates: Systematic review and meta-analysis of heritability estimates. Neuroscience & Biobehavioral Reviews. 2020;109:78-89.

  4. Itani O, Jike M, Watanabe N, Kaneita Y. Short sleep duration and health outcomes: a systematic review, meta-analysis, and meta-regression. Sleep Medicine. 2017;32:246-56.

  5. Silva AAd, Mello RGBd, Schaan CW, Fuchs FD, Redline S, Fuchs SC. Sleep duration and mortality in the elderly: a systematic review with meta-analysis. BMJ open. 2016;6(2):e008119.

  6. Jike M, Itani O, Watanabe N, Buysse DJ, Kaneita Y. Long sleep duration and health outcomes: A systematic review, meta-analysis and meta-regression. Sleep Medicine Reviews. 2018;39:25-36.

  7. Ho KKN, Ferreira PH, Pinheiro MB, Aquino Silva D, Miller CB, Grunstein R, et al. Sleep interventions for osteoarthritis and spinal pain: a systematic review and meta-analysis of randomized controlled trials. Osteoarthritis and Cartilage. 2019;27(2):196-218.

  8. Lunsford-Avery JR, Krystal AD, Kollins SH. Sleep disturbances in adolescents with ADHD: A systematic review and framework for future research. Clinical Psychology Review. 2016;50:159-74.

  9. Yin J, Jin X, Shan Z, Li S, Huang H, Li P, et al. Relationship of Sleep Duration With All‐Cause Mortality and Cardiovascular Events: A Systematic Review and Dose‐Response Meta‐Analysis of Prospective Cohort Studies. Journal of the American Heart Association. 2017;6(9):e005947.

  10. Gottlieb E, Landau E, Baxter H, Werden E, Howard ME, Brodtmann A. The bidirectional impact of sleep and circadian rhythm dysfunction in human ischaemic stroke: A systematic review. Sleep Medicine Reviews. 2019;45:54-69.

  11. Leong RLF, Cheng GHL, Chee MWL, Lo JC. The effects of sleep on prospective memory: A systematic review and meta-analysis. Sleep Medicine Reviews. 2019;47:18-27.

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  20. Galbiati A, Verga L, Giora E, Zucconi M, Ferini-Strambi L. The risk of neurodegeneration in REM sleep behavior disorder: A systematic review and meta-analysis of longitudinal studies. Sleep Medicine Reviews. 2019;43:37-46.

  21. Anothaisintawee T, Reutrakul S, Van Cauter E, Thakkinstian A. Sleep disturbances compared to traditional risk factors for diabetes development: Systematic review and meta-analysis. Sleep Medicine Reviews. 2016;30:11-24.

  22. Lee SWH, Ng KY, Chin WK. The impact of sleep amount and sleep quality on glycemic control in type 2 diabetes: A systematic review and meta-analysis. Sleep Medicine Reviews. 2017;31:91-101.

  23. Irwin MR, Olmstead R, Carroll JE. Sleep Disturbance, Sleep Duration, and Inflammation: A Systematic Review and Meta-Analysis of Cohort Studies and Experimental Sleep Deprivation. Biological Psychiatry. 2016;80(1):40-52.

  24. Cox RC, Olatunji BO. A systematic review of sleep disturbance in anxiety and related disorders. Journal of Anxiety Disorders. 2016;37:104-29.

  25. Pires GN, Bezerra AG, Tufik S, Andersen ML. Effects of acute sleep deprivation on state anxiety levels: a systematic review and meta-analysis. Sleep Medicine. 2016;24:109-18.

  26. Bao Y-P, Han Y, Ma J, Wang R-J, Shi L, Wang T-Y, et al. Cooccurrence and bidirectional prediction of sleep disturbances and depression in older adults: Meta-analysis and systematic review. Neuroscience & Biobehavioral Reviews. 2017;75:257-73.

  27. Winsper C, Tang NKY, Marwaha S, Lereya ST, Gibbs M, Thompson A, et al. The sleep phenotype of Borderline Personality Disorder: A systematic review and meta-analysis. Neuroscience & Biobehavioral Reviews. 2017;73:48-67.

  28. Melo MCA, Garcia RF, Linhares Neto VB, Sá MB, de Mesquita LMF, de Araújo CFC, et al. Sleep and circadian alterations in people at risk for bipolar disorder: A systematic review. Journal of Psychiatric Research. 2016;83:211-9.

  29. Konjarski M, Murray G, Lee VV, Jackson ML. Reciprocal relationships between daily sleep and mood: A systematic review of naturalistic prospective studies. Sleep Medicine Reviews. 2018;42:47-58.

  30. Hughes AJ, Dunn KM, Chaffee T. Sleep Disturbance and Cognitive Dysfunction in Multiple Sclerosis: a Systematic Review. Current Neurology and Neuroscience Reports. 2018;18(1):2.

  31. Miller MA, Kruisbrink M, Wallace J, Ji C, Cappuccio FP. Sleep duration and incidence of obesity in infants, children, and adolescents: a systematic review and meta-analysis of prospective studies. Sleep. 2018;41(4).

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  35. Ward AL, Reynolds AN, Kuroko S, Fangupo LJ, Galland BC, Taylor RW. Bidirectional associations between sleep and dietary intake in 0–5 year old children: A systematic review with evidence mapping. Sleep Medicine Reviews. 2020;49:101231.

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  45. Rubio-Arias JÁ, Marín-Cascales E, Ramos-Campo DJ, Hernandez AV, Pérez-López FR. Effect of exercise on sleep quality and insomnia in middle-aged women: A systematic review and meta-analysis of randomized controlled trials. Maturitas. 2017;100:49-56.

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  47. Kovacevic A, Mavros Y, Heisz JJ, Fiatarone Singh MA. The effect of resistance exercise on sleep: A systematic review of randomized controlled trials. Sleep Medicine Reviews. 2018;39:52-68.

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  56. Simou E, Britton J, Leonardi-Bee J. Alcohol and the risk of sleep apnoea: a systematic review and meta-analysis. Sleep Medicine. 2018;42:38-46.

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  58. Lin P-C, Lee P-H, Tseng S-J, Lin Y-M, Chen S-R, Hou W-H. Effects of aromatherapy on sleep quality: A systematic review and meta-analysis. Complementary Therapies in Medicine. 2019;45:156-66.

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Disclaimer: The information provided on Nuzest is for educational and informational purposes only. The information provided on this site is not, nor is it intended to be, a substitute for professional advice or care. Please speak to your qualified healthcare professional in the event that something you have read here raises questions or concerns regarding your health.

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Good Green Vitality

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