Comment by nradov
13 hours ago
What's the hypothesis there? Were they just shitting out the extra starch without digesting it? Due to conservation of energy the calories can't just vanish.
It doesn't seem physically possible for most adult men to consume 13 pounds of potatoes a day. I'm a large man and I think I'd burst or vomit before choking down that much, regardless of how hard I'd been working. Most likely that number is just wrong.
>it doesn't seem physically possible for most adult men to consume 13 pounds of potatoes a day. I'm a large man and I think I'd burst or vomit before choking down that much,
Presumably you aren't doing hard manual labor every day.
I thought human bodies adapt to strenuous effort and become more efficient over time. Meaning your average keyboard jockey might need 4000 calories per day if they become a manual laborer. But over time their body would adjust and they'd be able to get by on maybe 3000 calories.
Not every day now, but I've done enough hard manual labor to know that it wouldn't allow me to eat 13 pounds of potatoes. Seriously no one was eating that much on as regular basis.
If your diet is 90% potatoes and you do hard manual labor all day, you would absolutely need about 7 pounds of potatoes (2500 calories). I don’t think 13 pounds seems that crazy. I have sat down at a meal and eaten 3 pounds of potatoes before.
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13 pounds of potatoes is about 4600 kcals. That's in the range of what an NFL athlete consumes in a day.
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>Not every day
There's the difference.
Once you spend every single day doing hard manual labor for years consuming potatoes for the majority of your calories then tell me 13 pounds is impossible.
Sure, its impossible for you now, but that's totally irrelevant. An equivalent statement would be "it's totally impossible for a human to throw a baseball at 90mph, I tried for a whole week once and I only threw 40mph."
Hypothesis is that the irishmen were doing hard physical labor that required a high caloric intake. PCT thru-hikers consume 4,000-4,500 calories per day (at least I did) while staying thin. According to inter-net, 13 lb of potatoes has about 4,500 calories. Apparently US civil war soldiers expended 3-4k per day.
I was responding to the claim by @codeableconcept that the absence of significant dietary fat somehow prevents obesity, independent of energy balance. That seems unlikely.
Obviously it's possible for an active man to expend ~4500 kcal/day. I've done it myself many times. Even back during the Civil War, US soldiers typically consumed more energy dense food and only got a fraction of their calories from potatoes.