Notices
Results 1 to 7 of 7

Thread: How/why do we lose weight overnight?

  1. #1 How/why do we lose weight overnight? 
    Forum Ph.D. Raziell's Avatar
    Join Date
    Sep 2008
    Posts
    928
    Not sure if this is a myth or not. But it goes "Dont weigh yourself before sleep, because you lose weight overnight".

    Where exactly would that weight "go"?

    Respiration? No way you lose noticable weight on breathing.
    Sweat? Not even a really fat person would sweat more than 1DL during a night.
    Farting? Nope, thats pretty much air.

    So where exactly would mass from your body diseappar from while sleeping?


    A lie is a lie even if everyone believes it. The truth is the truth even if nobody believes it. - David Stevens
    Reply With Quote  
     

  2.  
     

  3. #2  
    Northern Horse Whisperer Moderator scheherazade's Avatar
    Join Date
    Sep 2012
    Location
    Yukon, Canada
    Posts
    4,054
    Depending on how much water you have in your system to start, you can lose a pound or more of moisture overnight through respiration and transpiration. Usually upon awakening, most people also need to urinate, and by these three means, one can eliminate roughly 2 pounds of 'water weight' overnight.

    HowStuffWorks "Why do I lose weight while I sleep?"


    Reply With Quote  
     

  4. #3  
    Moderator Moderator Janus's Avatar
    Join Date
    Jun 2007
    Posts
    2,067
    Quote Originally Posted by scheherazade View Post
    Depending on how much water you have in your system to start, you can lose a pound or more of moisture overnight through respiration and transpiration.
    Yep, that is why tents are designed with a breathable fabric and rain fly rather than just a single water proof layer. Otherwise, in a two-man hiking tent you could wake up the next morning with a sleeping bag damp from just the water you breathed out over night.
    "Men are apt to mistake the strength of their feelings for the strength of their argument.
    The heated mind resents the chill touch & relentless scrutiny of logic"-W.E. Gladstone


    Edit/Delete Message
    Reply With Quote  
     

  5. #4  
    Suspended
    Join Date
    Mar 2014
    Posts
    1,041
    The body burns calories and creates heat and you do lose water through the pores of the skin. It also pumps blood and processes toxins and does lots of metabolic stuff whether you are asleep or not.
    Reply With Quote  
     

  6. #5  
    Forum Radioactive Isotope Paleoichneum's Avatar
    Join Date
    Oct 2008
    Location
    Washington State, USA
    Posts
    4,561
    Quote Originally Posted by Mayflow View Post
    It also pumps blood and processes toxins and does lots of metabolic stuff whether you are asleep or not.
    All of which are internal and will not change the body weight. They will all just change the chemical composition of molecules.

    As already noted sweating and transperation are the major routes for weight loss during sleep.
    If more of us valued food and cheer and song above hoarded gold, it would be a merrier world. -Thorin Oakenshield

    The needs of the many outweigh the need of the few - Spock of Vulcan & Sentinel Prime of Cybertron ---proof that "the needs" are in the eye of the beholder.
    Reply With Quote  
     

  7. #6  
    Time Lord
    Join Date
    Apr 2008
    Posts
    5,305
    The skin is a massive organ, and may hold more or less moisture. Perhaps you could gain weight by falling asleep in the bath?


    EDIT: Okay I gotta try this.

    1) Body weight with normally dry skin.

    2) 1 hr. soak.

    3) Body weight with fully hydrated skin.

    ...
    A pong by any other name is still a pong. -williampinn
    Reply With Quote  
     

  8. #7  
    Forum Sophomore Hymenophyllum's Avatar
    Join Date
    May 2013
    Location
    Poland
    Posts
    170
    Your brain still exercise while you are sleeping.
    I can't speak english.
    Reply With Quote  
     

Similar Threads

  1. Replies: 146
    Last Post: July 10th, 2013, 05:36 PM
  2. how to scientifically lose weight/fat?
    By adikboy in forum Biology
    Replies: 49
    Last Post: March 17th, 2013, 06:16 AM
  3. Replies: 1
    Last Post: January 4th, 2013, 01:35 AM
  4. Do atoms lose mass as they slow down?
    By Quantime in forum Physics
    Replies: 63
    Last Post: July 15th, 2012, 11:07 AM
  5. Anyone else think the U.S. will lose two aircraft carriers this summer?
    By Aristarchus in Exile in forum General Discussion
    Replies: 19
    Last Post: March 6th, 2012, 12:08 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •