Live data from Hacker News

Running 50km after 82h of fasting

blog.xavivives.com

1–10 of 123 posts

Re: Running 50km after 82h of fasting

#2
I'm not sure if this is pseudoscience or anecdata but I'm sure I could find six doctors saying that this is a horrible idea.

From the post: "I couldn’t find any publication about ultra distances and significant amount of fasting."

This is not a medical study. This is an individual and could be anything from simply dumb and dangerous to body dysmorphia. Not everything can be safely hacked, friends.

Re: Running 50km after 82h of fasting

#3
Author looks like he doesn't even lift. Opinion discarded.

PS: To the people scouting his blog. Do yourselves a favor and research catecholamines and the role of stress hormones before taking his advice on performing a single meal a day under what happens to be a caloric deficit scenario. Guy has a long way to go in terms of nutrition and sports performance.

Re: Running 50km after 82h of fasting

#4
post #2

I'm not sure if this is pseudoscience or anecdata but I'm sure I could find six doctors saying that this is a horrible idea. From the post: "I couldn’t find any publication about ultra distances and significant amount of fasting." This is not a medical study. This is an individual and could be anything from simply dumb and dangerous to body dysmorphia. Not everything can be safely hacked, friends.

The only fundamental difference between this and a 'proper' scientific experiment is the p value. All scientific experiments have cavets, and all have a probability their finding could be erroneous. Of course, no one should write a textbook based on this one guys self-reported experience. But, assuming he is accurately reporting it, it is evidence that this is _possible_ which is a very important thing to discover.

Yes, it may only be possible in 0.01% of the population, that is the type of thing which a larger-scale study can evaluate, but whatever they find, it will be an interesting result which would have been less likely if he hadn't shown it could be done.

Re: Running 50km after 82h of fasting

#7

Author looks like he doesn't even lift. Opinion discarded. PS: To the people scouting his blog. Do yourselves a favor and research catecholamines and the role of stress hormones before taking his advice on performing a single meal a day under what happens to be a caloric deficit scenario. Guy has a long way to go in terms of nutrition and sports performance.

[deleted]

Re: Running 50km after 82h of fasting

#8
While this may be possible, I would worry about the effects on your liver. Ketosis does put additional strain on the liver, and while it doesn't seem like the side effects of extended ketosis are dangerous, there simply aren't any studies on ultra-endurance exercise during ketosis. And while studies on extended exercise during ketosis would be a good thing, they should be performed by researchers and doctors who know what the risks are and can monitor them appropriately.

IMO this is dangerous. Just because our hunter-gatherer ancestors did it doesn't mean it's healthy for us. For all we know, this type of activity could wreck your liver and contribute to dying in your 30s (our ancestors did not have a long life expectancy). So even if it was a survival adaptation, it may have ensured the survival of the herd at the cost of the individual.

Re: Running 50km after 82h of fasting

#9
post #2

I'm not sure if this is pseudoscience or anecdata but I'm sure I could find six doctors saying that this is a horrible idea. From the post: "I couldn’t find any publication about ultra distances and significant amount of fasting." This is not a medical study. This is an individual and could be anything from simply dumb and dangerous to body dysmorphia. Not everything can be safely hacked, friends.

Your point is valid, but your wording could have been better (I assume that is the reason for the down votes).

He doesn't mention consulting a doctor to explain the health risks before undertaking this. In my opinion, even if you think a medical professional is going to say you are stupid for trying it, you should still consult a medical professional. You need to be aware of the risks and their signs, and when you post something like this on your blog, it should be prefaced with you probably shouldn't try this.

What if someone dies trying to recreate his experiment? (I know common sense etc...)

Re: Running 50km after 82h of fasting

#10
post #4
post #2

I'm not sure if this is pseudoscience or anecdata but I'm sure I could find six doctors saying that this is a horrible idea. From the post: "I couldn’t find any publication about ultra distances and significant amount of fasting." This is not a medical study. This is an individual and could be anything from simply dumb and dangerous to body dysmorphia. Not everything can be safely hacked, friends.

The only fundamental difference between this and a 'proper' scientific experiment is the p value. All scientific experiments have cavets, and all have a probability their finding could be erroneous. Of course, no one should write a textbook based on this one guys self-reported experience. But, assuming he is accurately reporting it, it is evidence that this is _possible_ which is a very important thing to discover. Y…

Nonsense. A proper scientific experiment would have controls and independent results and medical oversight and calibrated measurement equipment and a clear definition of what's attempting to be proved.

This is a guy fooling around and blogging for attention. Dangerously so. p=1, no scientific method = anecdata. His conclusions? Pseudoscience. It's dangerous to him personally and it's damaging to society broadly to promote such without caveats. So I'm providing them.

Post reply on HN