May 31, 2022

Diet & Sleep

Dieting while sleep deprived

Read Time < 1 minute

This audio clip is from our sleep series with Matthew Walker, Ph.D. — episode #48 – heart disease, cancer, sexual function, and the causes of sleep disruption (and tips to correct it). This episode originally aired on April 8, 2019.

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Show Notes

Fuel partitioning and dieting while sleep deprived [16:45]

Dietary changes when you are sleep deprived:

⇒ Peter says: “I’m at my worst when I am sleep deprived. It’s so hard to avoid junk food. Whereas probably the single greatest tool in my arsenal to eat well, is to sleep well.

Fuel partitioning

  • The energy balance of organism (regulation and input) – how much to eat and how the body uses it – is affected by sleep
  • RQ (respiratory quotient) goes up when sleep deprived
  • Respiratory quotient going up implies that under the same level of exertion, you would preferentially go after glycogen for ATP, as opposed to fat
    • This signals a metabolic inefficiency

Dieting while sleep deprived

  • This great study showed that dieting when underslept (6 hrs or less) was much less effective in terms of fat loss
  • If underslept, 70% of what you lose is from lean muscle mass (the body holds onto fat)
  • A big reason for this above is the high levels of cortisol (stress hormone) and insulin
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Matthew Walker Ph.D.

Dr. Walker earned his degree in neuroscience from Nottingham University, UK, and his PhD in neurophysiology from the Medical Research Council, London, UK. He subsequently became a Professor of Psychiatry at Harvard Medical School, USA. Currently, he is Professor of Neuroscience and Psychology at the University of California, Berkeley, USA. He is also the founder and director of the Center for Human Sleep Science.

Dr. Walker’s research examines the impact of sleep on human health and disease. He has received numerous funding awards from the National Science Foundation and the National Institutes of Health, and is a Kavli Fellow of the National Academy of Sciences.

Dr. Walker is the author of the International Bestseller, Why We Sleep. It has a singular goal: to reunite humanity with sleep.

In addition, Dr. Walker is an internationally recognized speaker, a successful entrepreneur, and a Sleep Scientist for Google.

[sleepdiplomat.com]

Twitter: @sleepdiplomat

Center for Human Sleep Science: https://www.humansleepscience.com/

Matthew’s publications: https://www.humansleepscience.com/p-u-b-l-i-c-a-t-i-o-n-s

Disclaimer: This blog is for general informational purposes only and does not constitute the practice of medicine, nursing or other professional health care services, including the giving of medical advice, and no doctor/patient relationship is formed. The use of information on this blog or materials linked from this blog is at the user's own risk. The content of this blog is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Users should not disregard, or delay in obtaining, medical advice for any medical condition they may have, and should seek the assistance of their health care professionals for any such conditions.
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