Lately I’ve been wondering why is it that I can go to bed at a certain weight and wake up 4 pounds lighter?
I don’t recall waking up in the middle of the night to take a piss on these nights and even if I did - 4 pounds of urine?!?! I don’t see how its possible.
Can anybody explain this phenomenon to me?[/quote]
I agree with the breathing/loss of fluid, and heat expenditure.
I am the same way too. 179 at night, 175 in the morning.
Someone mentioned gyclogen depletion. It makes sense that this is number one reason people see a sharp loss in weight when they start dieting and/or working out. I was losing weight and got down to 171, while doing ~16hrs/week on my bike. I took a rest week and my weight went up 4lbs. I didn’t get any “fatter”.
If I go out and do a 6hr ride, i come back and I’m 5lbs less than before the ride. After rehydrating completely I’m still ~3 lbs under. I probally burned 4500 calories (1.3 lbs), and the remainder of weight loss is gyclogen depletion.