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Normal to lose 2 or 3 pounds while sleeping?

Answered on August 19, 2014
Created March 15, 2013 at 10:57 AM

I weighed 193 when I went to bed.

I weighed 190 when I woke up.

The temperature of my bedroom is 70F degrees and the relative humidity is 33%

I slept about 6 hours.

Is it all just water evaporation?

Am I losing minerals too, or just concentrating electrolytes because there is less water to dissolve them?

I'm really trying hard to focus on hydration and getting enough sodium & potassium in hopes that's what's causing muscle cramps and tension headaches. I think I've ruled out magnesium, calcium and I've been around the sodium potassium route before, but I might not have given it enough time or consumed enough. I'm trying again. And, of course, I'm not logging my water consumption.

Any hacks or tweaks that might be relevant to overnight hydration?

Thanks, Mike

3fc95bca9e723edfbbb72b172798ab49

(1354)

on March 30, 2013
at 12:40 AM

Indeed, Renee is spot on. It is exactly what I do. I break the (seemingly) cardinal rule and weigh myself EVERY SINGLE morning (wake up, pee, weigh). I, however, keep very thorough records and charts and don't let any given weighing be too encouraging/discouraging. It's all about the general trend of the graph. And, as others have mentioned, you can lose a surprising amount each night via breath, sweat, etc.. The bathroom isn't the only place our bodies dump our various byproducts.

7fc82eebafd44badc73c520f44660150

(3275)

on March 16, 2013
at 04:11 AM

I'm glad I'm not the only one who weighs myself at bed and at wake :-)

Ebb10603524dd22621c1155dd7ddf106

(19150)

on March 15, 2013
at 01:39 PM

I absolutely agree with @Renee - if you're going to weight yourself on a scale, then do it at the same time on any given day. For example, when I weight myself (weekly at most), it's in the morning after I void.

32f5749fa6cf7adbeb0b0b031ba82b46

(41747)

on March 15, 2013
at 12:19 PM

Back of the napkin calculation: about 50 grams per night from CO2. Not sure if that's right though, as I only get about 30 grams from water... basic math is not my strong suit. ;)

F92e4ca55291c3f3096a3d4d3d854986

(11698)

on March 15, 2013
at 11:36 AM

Morning is usually when you're the lightest. That's why people recommend you weigh yourself only once a day (at most) and at the same time each day, in the morning after you pee, to get the most consistent readings.

F92e4ca55291c3f3096a3d4d3d854986

(11698)

on March 15, 2013
at 11:35 AM

Morning is usually when you're the lightest. That's why people recommend you weigh yourself only once a day, in the morning after you pee, to get the most consistent readings.

3327924660b1e2f8f8fc4ca27fedf2b2

(2919)

on March 15, 2013
at 10:58 AM

Yes, it's normal.

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3 Answers

best answer

1
E2168bd5f5406ee51cc43d3f33a497ce

on March 16, 2013
at 12:06 AM

I lose exactly 3lbs overnight, everynight. I like to weigh myself at night and the morning just to verify it, it's like clockwork, always exactly 3lbs no matter how much water I drink or even if I have a snack before bed.

7fc82eebafd44badc73c520f44660150

(3275)

on March 16, 2013
at 04:11 AM

I'm glad I'm not the only one who weighs myself at bed and at wake :-)

0
89fa2da4805b0b4e54b77a5a20a2e206

on March 15, 2013
at 05:10 PM

try stepping onto your scale with the left foot first :) works for me in lowering the number so maybe itll work for you too to make it go higher. U sure ur cat didnt bump into the needle adjuster? jk .. but yeah 2-3 lb weight loss overnights no biggie. Means your metabolic furnace is working well id say.

0
7e1433afbb06c318c4d90860d493c49d

(5959)

on March 15, 2013
at 11:57 AM

It's not all just water evaporation, because the CO2 in your exhaled breath is also weight leaving your body. And, if you're sweating, there's electrolyte loss into the sheets. But, yeah, I'd wager it's mostly just water loss.

32f5749fa6cf7adbeb0b0b031ba82b46

(41747)

on March 15, 2013
at 12:19 PM

Back of the napkin calculation: about 50 grams per night from CO2. Not sure if that's right though, as I only get about 30 grams from water... basic math is not my strong suit. ;)

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