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Anonymous
One pound of fat is approx ~3500 calories. Assuming you need to burn 5 pounds, you'd need to lose 17500 calories.
Depending on your body size you lose a certain amount of calories just by living. For me I need about 2200 to sustain my weight. If I burned 1500 calories through intense exercise it'd mean I burn 3700 calories in a day, if I then ate 600 calories I'd be at a 3100 calorie deficit.
3100 X 2 = 6200, a far cry from the 17500 needed to actually lose the weight. You'd have to lose the rest of the poundage through water loss and crapping.
There's no point in losing water weight at a sauna or whatever several days before your weigh in. You'll just put the water weight back on again, and if you don't drink, you're heading for the hospital. Losing water weight is something you do immediately before your weigh in, not several days before.
Some people have several pounds of fecal matter in their intestines, a good laxitive before your weigh in might make you lose a few pounds. If your pooper system is healthy though, you won't lose much at all because it will be pretty clear anyway. Again, this is something you do shortly before your weigh in, if you do it a few days before you'll put some of the weight back on.
If you're doing this to make weight for a fight you should have left yourself more time. This kind of thing should be done more gradually. You're probably screwed.
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