[Yardstick]

25 lbs, that is substantial. And then 12 lbs back in a day...that’s almost the more impressive number. That’s a lot of dang food.

[rlmorel]

I lost eight pounds one night playing hockey-I only weighed myself to find out because I was pretty dizzy when I got home...

I know. Not healthy.

[dirtboy]

Yeah, the instructors told me to slow down or I would get sick. I didn't slow down and I didn't get sick. We went to an all-you-can-eat prime rib restaurant and I must have eaten close to ten portions.

Basically, I was refilling an empty digestive tract in one day.

[Ozark Tom]

Three pounds body fat per day (7000 calories each) and reduction of fluid retention in the gut could account for 25# weight loss.

Mayo Clinic study reflects +500 calorie per hour expended by a person of 160#’s hiking with a light backpack. This is on top of basal metabolism of 1600–2000 calories.