4 ms·

It seems to me that metabolic state should also be taken into account. A lower respiratory quotient for fat metabolism means expelled CO2 is much lower when ut

It seems to me that metabolic state should also be taken into account. A lower respiratory quotient for fat metabolism means expelled CO2 is much lower when utilising fat for energy (CO2 litres per kcal [0]), making respiration easier and requiring less tidal volume. A lower CO2 concentration in the alveolar space means O2 can be more effectively taken into the blood [1]. Hormonal disruptions also seem to play a role [2]. [0]: http://hyperphysics.phy-astr.gsu.edu/hbase/Biology/metab.html http://hyperphysics.phy-astr.gsu.edu/hbase/Biology/metab.htm... [1]: https://academic.oup.com/bjaed/article/13/1/17/281180 https://academic.oup.com/bjaed/article/13/1/17/281180 [2]: https://www.ncbi.nlm.nih.gov/pubmed/30008674 https://www.ncbi.nlm.nih.gov/pubmed/30008674

atomical 8y ago
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- glastra 8y ago
  I'm sorry, but what does this have to do with my comment? Either way, it greatly depends on what you understand by "efficient". I dare to assume you are referring to ease of access, which is by no means a measure of efficiency.
HyruleanHero 8y ago
Would it be fair to say that a conclusion you could draw from the data you outlined here would be that people currently in ketosis would fair better at higher altitudes? Sorry if I'm misunderstanding this, this is very far from my area of expertise.
- atomical 8y ago
  Wouldn't that be that people with carbohydrate surplus fair better?
- glastra 8y ago
  I derive that same conclusion by using common sense, but unfortunately I don't have any answer other than that. I could find some anecdotes online, but that's all. There's also this: https://www.ncbi.nlm.nih.gov/pubmed/24917038 https://www.ncbi.nlm.nih.gov/pubmed/24917038
charlieo88 8y ago
Isn't respiration triggered by the need to expel CO2 and not the need for O2? https://en.wikipedia.org/wiki/Inert_gas_asphyxiation https://en.wikipedia.org/wiki/Inert_gas_asphyxiation
- deleted 8y ago
  [deleted]

atomical 8y ago

glastra 8y ago
I'm sorry, but what does this have to do with my comment? Either way, it greatly depends on what you understand by "efficient". I dare to assume you are referring to ease of access, which is by no means a measure of efficiency.

HyruleanHero 8y ago

Would it be fair to say that a conclusion you could draw from the data you outlined here would be that people currently in ketosis would fair better at higher altitudes? Sorry if I'm misunderstanding this, this is very far from my area of expertise.

atomical 8y ago
Wouldn't that be that people with carbohydrate surplus fair better?
glastra 8y ago
I derive that same conclusion by using common sense, but unfortunately I don't have any answer other than that. I could find some anecdotes online, but that's all. There's also this: https://www.ncbi.nlm.nih.gov/pubmed/24917038 https://www.ncbi.nlm.nih.gov/pubmed/24917038

charlieo88 8y ago

Isn't respiration triggered by the need to expel CO2 and not the need for O2? https://en.wikipedia.org/wiki/Inert_gas_asphyxiation https://en.wikipedia.org/wiki/Inert_gas_asphyxiation

deleted 8y ago
[deleted]