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TOPIC: Why do I weigh less in the morning?

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March 1, 2011 8:24 PM
Ok.... weird question, yes. But, I've been wracking my brain about this for weeks now!

A few times, simply out of curiosity, I have weighed myself before bed and after I wake up. Sometimes I weigh as much as 2 pounds less in the morning than I do at night!

Every time I weigh myself I am completely nude (sorry, but it had to be said), it is the same scale in the same place. In the morning I weighed myself BEFORE I went to the bathroom (again, sorry, but that seems relevant). I do not pee the bed (at least I don't think so, hahaha) and am not a big night-sweater or night-drooler (lol at 2 pounds of drool on my pillow). So WHY would a person weigh 2 pounds less in the morning than at night? Does it simply evaporate: and if so, in what form?

My only theory so far... and this is probably REALLY stretching it.... is that a person breathes deeper at night, thus saturating the body in oxygen, causing one to weigh less (sort of like a balloon). But that is probably REALLY silly. Who has a better explanation? There MUST be a reason for this!
  3849501
March 1, 2011 8:28 PM
It's totally normal for your weight to change throughout the day - this is why it's ideal to weigh yourself first thing after your morning pee : )
Mainly I think it has to do with all your fluids... I can weigh up to 4lb more before bed than in the morning, and I fluctuate throughout the day, but I drink a lot of fluids and also I perspire a lot, including in my sleep!
Nothing to worry about : )
  2854066
March 1, 2011 8:29 PM
I'm the same way....It's kind of depressing to weigh yourself in the morning and think u r down 4 pounds, and then that afternoon you are only down by 2!!! I've decided to weigh only in the mornings!!! I put my scale under my bed and only take it out Thursday mornings :))
  4581473
March 1, 2011 8:30 PM
You're better off just weighing yourself first thing in the morning so as not to get depressed since the average human body can fluxiate as much as 4lbs during the day! Here's what I found online to answer your question.

You weigh less in the morning because when your body
converts food materials to energy, CO2 and water vapour are released as waste products - and are expelled from the body (that's why when you breath on glass condensation appears). If you think about it - this is happening all night - so a fair amount of water leaves your body. A third of the body's water loss occurs at night - and can amount to about 2 or 3lbs.
Also, you will clearly weigh more when you eat/drink something - you will be adding the weight of that food to your body. However, this won't necessarily make you 'put on' weight because the food is essentially burned off/ waste products leave the body (unless excessive calories are consumed which are more than the number you use in a day) - so basically, you will essentially stay the same weight if you eat a normal amount of food.
March 1, 2011 8:30 PM
It's due to digestion and the extra food in your stomach at night verus the morning. I always weigh myself in the morning right before I get changed for the day.
March 1, 2011 8:32 PM
and if you are like me when you wake up you pee. pee= weight. but yes your body digests and eats some of yesterdays food.
March 1, 2011 8:34 PM
I'm trying to remember all the technicalities on this one. The main reason is changes in the amount of water in your system. You can lose water constantly- not just when you get up to go pee or drooling on the pillow. happy Sweating, and even just the process of breathing will play a part.

QUOTE:
So WHY would a person weigh 2 pounds less in the morning than at night? Does it simply evaporate: and if so, in what form?


I'm sorry, but I just had to laugh. I'm picturing my fat just evaporating away while I sleep, and now I think I might go to bed early and turn the alarm off. Thanks for the great mental image!
March 1, 2011 8:40 PM
QUOTE:

You're better off just weighing yourself first thing in the morning so as not to get depressed since the average human body can fluxiate as much as 4lbs during the day! Here's what I found online to answer your question.

You weigh less in the morning because when your body
converts food materials to energy, CO2 and water vapour are released as waste products - and are expelled from the body (that's why when you breath on glass condensation appears). If you think about it - this is happening all night - so a fair amount of water leaves your body. A third of the body's water loss occurs at night - and can amount to about 2 or 3lbs.
Also, you will clearly weigh more when you eat/drink something - you will be adding the weight of that food to your body. However, this won't necessarily make you 'put on' weight because the food is essentially burned off/ waste products leave the body (unless excessive calories are consumed which are more than the number you use in a day) - so basically, you will essentially stay the same weight if you eat a normal amount of food.


Thank You, so much! That is EXACTLY the answer I was hoping to get! I hadn't considered Co2 being released as a waste product! Now I can go to bed happy that I have learned something... and weigh less tomorrow, too! :-)

YOU are AWESOME!!!

Thanks everyone else for your answers, too!
  3849501
March 1, 2011 8:42 PM
QUOTE:



I'm sorry, but I just had to laugh. I'm picturing my fat just evaporating away while I sleep, and now I think I might go to bed early and turn the alarm off. Thanks for the great mental image!


Something to meditate on! And: you're welcome! tongue happy
  3849501
March 1, 2011 8:44 PM
QUOTE:
So WHY would a person weigh 2 pounds less in the morning than at night? Does it simply evaporate: and if so, in what form?


I'm sorry, but I just had to laugh. I'm picturing my fat just evaporating away while I sleep, and now I think I might go to bed early and turn the alarm off. Thanks for the great mental image!


That post about the fat evaporating just made my night! If only that were true!!!
March 1, 2011 8:44 PM
PS..... Usually I do only weigh myself in the morning. But, I'm a very curious person, so on occasion I have weighed myself before and after doing different activities just to see if said activity makes a difference. For example: After taking a long hot bath I usually weigh a pound less!! Probably from sweating, I suppose: but still interesting!
  3849501
March 1, 2011 8:49 PM
QUOTE:

You weigh less in the morning because when your body
converts food materials to energy, CO2 and water vapour are released as waste products - and are expelled from the body (that's why when you breath on glass condensation appears). If you think about it - this is happening all night - so a fair amount of water leaves your body. A third of the body's water loss occurs at night - and can amount to about 2 or 3lbs.


That was really informative. Thanks! And thanks to the OP for asking. I always wondered why the weigh-yourself-first-thing-in-the-morning concept was so widespread.
March 1, 2011 8:55 PM
Gotta also remember that you do burn calories while you sleep. That's why doctors always recommend 7-8 hours of sleep:

http://www.livestrong.com/article/280877-about-calories-burned-during-eight-hours-of-sleep/#
  3424959
March 2, 2011 7:46 AM
QUOTE:

Gotta also remember that you do burn calories while you sleep. That's why doctors always recommend 7-8 hours of sleep:

http://www.livestrong.com/article/280877-about-calories-burned-during-eight-hours-of-sleep/#


Thanks!
I knew that calories were burned while sleeping, but I guess my bigger question was "Where do they go?". There isn't any smoke coming out of my ears while I sleep, so I don't think the calories just thrown on a bonfire in my belly. The idea that the calories are broken down into Co2 and Water and breathed out of the body makes sense. :-)
  3849501
March 2, 2011 7:49 AM
QUOTE:

drooling on the pillow. happy Sweating, and even just the process of breathing will play a part.


brb, going to change my pillowcase indifferent
August 26, 2012 4:31 AM
Hi all.

So here is another related question. Let's say you weight 60kgs at 7am when you wake up, you eat or drink nothing and at 8am you weigh more?

Thanks
Nick
August 26, 2012 4:34 AM
Weighing yourself after you've eaten and drunk, is like stepping on the scale with a full plate of food and a bottle of water in your hands. When you consume something the weight from that doesn't magically disappear once it enters your body ;)
  24610673
August 26, 2012 4:38 AM
I've always figured it's because you haven't eaten for many hours and your body processes have kept on burning the calories.

My weight can fluctuation up t 4 lbs in a day. I actually find I am at my lightest a few hours after waking before eating anything.
  25050016
August 26, 2012 4:44 AM
[Redacted]
Edited by Spartan_Maker On August 26, 2012 4:44 AM
  25147453
August 26, 2012 4:45 AM
QUOTE:

QUOTE:

Gotta also remember that you do burn calories while you sleep. That's why doctors always recommend 7-8 hours of sleep:

http://www.livestrong.com/article/280877-about-calories-burned-during-eight-hours-of-sleep/#


Thanks!
I knew that calories were burned while sleeping, but I guess my bigger question was "Where do they go?". There isn't any smoke coming out of my ears while I sleep, so I don't think the calories just thrown on a bonfire in my belly. The idea that the calories are broken down into Co2 and Water and breathed out of the body makes sense. :-)


The calories go to your brain, heart, lungs, kidneys, pancreas, liver, sexual organs, muscle repair, eyes, skin, and hair, to keep you alive; and, of course, you're fasted during this time. That's your BMR/RMR. Plus, nighttime urination can account for several pounds.
Edited by Spartan_Maker On August 26, 2012 4:54 AM
  25147453
August 26, 2012 4:50 AM
It has to do with the fact that you sleep for so many hours during the night (6 to 8 hours, different for everyone) and your digestive system has that much time to digest everything that you eat and drink the day before, besides what you work off while exercising. As the day progresses, you body does not have the time to work off all the calories that you have consumed. Best thing to do is weigh yourself in the morning 1 day a week due to the body's capability to fluctuate the weight day to day.
  4295109
February 24, 2013 6:39 AM
The reason for the change in weight has to do with your hormones. Your body is constantly changing internally due to age, stress, exercise, hydration level, amount of sleep, sodium intake. But you also have to remember that once you have your period the cycle starts all over again in your body begin prepping for your next cycle. Thus the change in weight throughout the day. As for the difference between morning and evening. When you are at a verticle stance your heart has to pump harder to get the blood and excess fluid back up from the body parts that are below heart level. (i.e. swollen feet from a long day of standing). Versus when horizontal gravity isnt fighting your heart anymore so blood and fluids can travel much much easier through the body alowing the bidy to be efficient and eliminate the excess fuild (water weight).
February 24, 2013 6:46 AM
you lose weight thru breathing believe it or not... every exhale contains molecules much like how a car loses gas thru the exhaust pipe.. people think they lose body fat thru sweating its when they breathe.


lol so many answers here are retarded ^^ this is what actually happens.
Edited by monty619 On February 24, 2013 6:47 AM
  18466206
February 24, 2013 6:47 AM
Because poop.
February 24, 2013 6:55 AM
You weigh less in the morning simply because you are dehydrated and do not have food in your system.

DUring the day you eat and drink throughout the day and therefore you will weigh more because there is more stuff in your system. When you sleep, you aren't eating or drinking and therefore you have less food within your system and you are getting dehydrated causing you to weigh less in the morning.

You don't magically evaporate fat throughout the night.

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