4 hours of strenuous exercise. This should consume around 3000 kcals.
Studies have found that humans cannot consume more calories than 2.5x their basal metabolic rate.
Studies have found that humans cannot consume more calories than 2.5x their basal metabolic rate.
>> Someone on the internet wrote "humans cannot consume more calories than 2.5x their basal metabolic rate" -- which study might they be quoting?
> I am not aware of a specific study that states that humans cannot consume more calories than 2.5x their basal metabolic rate. Basal metabolic rate (BMR) is the amount of energy a person needs to maintain basic bodily functions such as breathing and digestion, and it can vary greatly depending on factors such as age, sex, and muscle mass. However, the total daily calorie needs of an individual also depend on their level of physical activity and other lifestyle factors. So, it's likely that this statement is a generalization or an over simplification.
"Incorporating data from overfeeding studies, we find evidence for an alimentary energy supply limit in humans of ~2.5× BMR"
A good book the topic is Herman Ponzer's "Burn"
The main issue seems the surface area of the GI tract.
https://www.science.org/doi/10.1126/sciadv.aaw0341
And nobody is saying you can't expend more energy for shorter times. It is just that you can't sustain it over long times because of our metabolic limits.