Why do we weigh less after a night's sleep?

CalorieGuru · March 2014

Surely you're all familiar with the phenomenom: you notice that you weigh less in the morning then you did the night before. But why? It doesn't make any sense to me. What do we lost in those 7 hours of sleep?

Note: This is assuming you don't use the washroom or eat anything between the night and morning weigh-ins.

DrWhoodles · March 2014

Ghosts

seltzermint555 · March 2014

Ghosts

QFT

kjw0528 · March 2014

No salt or water during the night?

jabbruz777 · March 2014

It takes a lot of energy just to meet your basal metabolic needs for your organs to function even at a low level over say 8 hours. Since you're not eating anything, you're not replenishing that energy expenditure.

toddis · March 2014

This video explains it all.

http://www.youtube.com/watch?v=lL2e0rWvjKI

IIRC, you basically are losing weight through breathing out carbon...or something.

CalorieGuru · March 2014

This video explains it all. http://www.youtube.com/watch?v=lL2e0rWvjKI

IIRC, you basically are losing weight through breathing out carbon...or something.

Thanks for helping answer the question!

DrJenO · March 2014

Can't view the video on my phone, but it's mostly evaporative (water) losses, also called insensible losses, from breathing all night without taking in any liquids.

Why do we weigh less after a night's sleep?

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