Live data from Hacker News

Running 50km after 82h of fasting

blog.xavivives.com

21–30 of 123 posts

Re: Running 50km after 82h of fasting

#21
Could all the people without medical knowledge please stop saying that their lack-of-medical-knowledge make them smarter than the guy that actually did this? Your requests for various random chemical levels are stupid. We have done science for thousands of years before blood tests were invented.

Re: Running 50km after 82h of fasting

#23
A couple points:

* He ran 50 KM in 7 hours and 45 minutes, which amounts to fast walking. In real terms, he probably ran some but probably walked most of it.

* If you're going to do something like this, please do it under the supervision of a medical doctor. A 50km isn't a big deal, virtually anyone who can run a marathon can run a 50k, but people do die during this events. Respect the distance.

Edit: Here is his Strava entry for the event: https://www.strava.com/activities/morning-run-436423654?utm_...

From my sloppy napkin math, it looks like he ran the distance (slowly) and probably stopped a lot and had his device configured to pause the time when he stopped.

I don't mean to sound down on the guy, he got out there and did 50km. And he specifically mentions he's no athlete. I am glad he documented his experience. But please don't use this as part of any "Couch to 50K" kind of scheme. Ketosis doesn't work like creatine.

Edit 2: A metric/imperial conversion pace chart here: https://www.globe-runners.com/sites/default/program_builder_...

Edit 3: pneumatics' comment, below corrects me: "The time spent moving was 5:49. His pace, excluding the time stopped, was 11:12 min/mi.

With the elevation gain, this is most definitely running." This is a pretty good performance for a newbie, IMHO.

For those saying it's slow, you've either never ran an ultra on rough terrain, or you've been on the cover of running magazines.

Re: Running 50km after 82h of fasting

#24

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.

I think you're just trolling. http://knowyourmeme.com/memes/do-you-even-lift

Re: Running 50km after 82h of fasting

#25
post #5

I've seen people die running a half marathon. Please don't push your body to the breaking point just for giggles. Work your way up.

Actually seen firsthand, or read about it having happened? (These are very different, because they imply much different prevalence.)

The author of the article records a short clip describing how he's feeling at each waypoint, and doesn't seem to have pushed himself terribly hard.

Re: Running 50km after 82h of fasting

#26

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.

Do you have any books or posts that you'd recommend looking at? There's a huge mountain of information I'm looking at right now. Any specific leads? I'm genuinely asking because I agree with you but didn't know about any link.

Re: Running 50km after 82h of fasting

#27
post #23

A couple points: * He ran 50 KM in 7 hours and 45 minutes, which amounts to fast walking. In real terms, he probably ran some but probably walked most of it. * If you're going to do something like this, please do it under the supervision of a medical doctor. A 50km isn't a big deal, virtually anyone who can run a marathon can run a 50k, but people do die during this events. Respect the distance. Edit: Here is his Str…

I did ran all the way. Surely it wasn't fast, but take in account that there was 2000+ meters of elevation gain.

Re: Running 50km after 82h of fasting

#28
My experience in endurance sports is with cycling, and I have a friend that used a "ketosis" diet to help lose some weight. My understanding of the fat burning process is that it can only happen so fast, so with fat as your fuel source you are only able to support moderate intensity levels. This could explain the 7h 45 min minute time for his 50km run (~31 miles).

I know if I am riding at race pace for a couple of hours and don't give myself fuel then I am in trouble, but riding at lower intensities I can go for a much longer time without eating as long as I have water.

Re: Running 50km after 82h of fasting

#29
post #17

I think the most important factor should not be whether you can do it or not, but if you can perform better in ketosis than those who are not in ketosis.

In Ironman and related circles it is conceded that performance is decreased, but the reduced calorie requirements in races often mean better results due to less, err, gut complications.

Re: Running 50km after 82h of fasting

#30
post #18
post #5

I've seen people die running a half marathon. Please don't push your body to the breaking point just for giggles. Work your way up.

I think you have to think about how those people died. Heat exhaustion? An underlying heart condition? I don't think they died of not having enough nutrients, or not eating soon enough before running.

Yes heat.

http://articles.chicagotribune.com/2011-06-04/news/ct-met-ha...

I'm just saying the whole "Push through the pain" adage is dangerous.

Post reply on HN