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Why do we sweat in our sleep, even in 31 degree weather?
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Adunh Slavy
#21 - 2011-12-09 11:58:46 UTC
When air is warmer, it can hold a lot more moisture, that "sweat" has someplace to go, the moisture can escape your blankets/sheets and go into the warm air. When the air is cooler above your blankets, the water can not evaporate as easily, so it stays.

This is the same reason that there is dew and frost in the morning. During the night, the air temp drops, the water is forced out of the air and is deposited on the ground.

All that nice warm air under your blankets, in winter, holds all that water, sooner or later it gets saturated and it begins to "rain" under the blankets and leaves you all sweaty.

Necessity is the plea for every infringement of human freedom. It is the argument of tyrants; it is the creed of slaves.  - William Pitt
Christopher AET
Federal Navy Academy
Gallente Federation
#22 - 2011-12-11 06:50:54 UTC
So I noticed I was getting pudgy too. So rather then some weird fix I just ran a few miles a week and cut my alcohol intake to like 5-10% of what it was. Now that shirt that was feeling like it was painted on is now almost baggy.

I drain ducks of their moisture for sustenance.
Herzog Wolfhammer
Sigma Special Tactics Group
#23 - 2011-12-11 07:53:43 UTC
I never heard of sleeping in the cold as a means of losing weight.

But the OP is still using blankets. If you want to be hard core, sleep naked and no blankets.

But this is NOT necessary AND it's already a good sign that you sweat in your sleep. This means your metabolism is working.


Here is what I can recommend. I am more than twice the age I was in high school, but I wear the same sized clothes that I wore back then.


Get all your carbs and fats in the morning,. and keep a light mainly protein dinner in the evening. To be able to sleep while heated up shows that you can sleep when your metabolism is jacked up but don't push it. Fact is that you need the protein more at night when you sleep but the carbs and fats are needed during the day, so load up on the fuel you need when you need it.


A lighter dinner will allow you to cool off better at night, and you would not need to sleep in the cold, but that's your option.

This has worked for me very well, and might work for the OP.

A lighter mainly protein dinner also cuts down on acid reflux in your sleep. If you are waking up with dragon breath in the morning, that means the acid and stuff is working up the pipes at night. This can also contribute to throat cancer. If you have this trouble, and don't want to resort to drugs, go a little lighter in the dinner and a little earlier until the problem goes away. The worst symptom of this is if your eyes are itchy too - the acid will get into your eyes through the sinuses.

Soon I am coming up on my "Christmas Swim" at the shooting range where I take a rifle into the mud and slime of the slough near the shooting range and torture test it. Last time I did that my balls were in my neck. But I can see the value of cold where giving the metabolism a kick in the ass matter.

Bring back DEEEEP Space!
Pr1ncess Alia
Doomheim
#24 - 2011-12-11 10:18:29 UTC  |  Edited by: Pr1ncess Alia
Go see a doctor.

When I got diagnosed with stage 3 cancer, it was only because I noticed I kept sweating profusely every time I slept regardless of conditions.

I thought "this is odd" and went for a checkup. A week later I was on chemo
Herzog Wolfhammer
Sigma Special Tactics Group
#25 - 2011-12-11 19:53:10 UTC
Pr1ncess Alia wrote:
Go see a doctor.

When I got diagnosed with stage 3 cancer, it was only because I noticed I kept sweating profusely every time I slept regardless of conditions.

I thought "this is odd" and went for a checkup. A week later I was on chemo



Good God!

I hate you a little less now.

A little.


Bring back DEEEEP Space!
Pr1ncess Alia
Doomheim
#26 - 2011-12-12 01:30:15 UTC
Herzog Wolfhammer wrote:

Good God!
I hate you a little less now.
A little.


meh, i had it easy all-in-all. please continue the hatred, it warms me.

i figured I'd throw it out there.
looking back on stuff like that you're like "wtf, why didn't i get checked out sooner?"

but you'd be surprised how easily you can rationalize health quirks and oddities away as if they were normal.


Renturu
In Glorium et Decorum
#27 - 2011-12-13 09:13:48 UTC
Interesting info:

Sleep Hyperhidrosis?

Ugh

By the orders of PlunderBunny: ☻/ /▌ / \ This is Bob, post him into your forum sig and help him conquer the forums.
Zions Child
Higashikata Industries
#28 - 2011-12-13 09:33:06 UTC
Herzog Wolfhammer wrote:
I never heard of sleeping in the cold as a means of losing weight.

But the OP is still using blankets. If you want to be hard core, sleep naked and no blankets.

But this is NOT necessary AND it's already a good sign that you sweat in your sleep. This means your metabolism is working.


Here is what I can recommend. I am more than twice the age I was in high school, but I wear the same sized clothes that I wore back then.


Get all your carbs and fats in the morning,. and keep a light mainly protein dinner in the evening. To be able to sleep while heated up shows that you can sleep when your metabolism is jacked up but don't push it. Fact is that you need the protein more at night when you sleep but the carbs and fats are needed during the day, so load up on the fuel you need when you need it.


A lighter dinner will allow you to cool off better at night, and you would not need to sleep in the cold, but that's your option.

This has worked for me very well, and might work for the OP.

A lighter mainly protein dinner also cuts down on acid reflux in your sleep. If you are waking up with dragon breath in the morning, that means the acid and stuff is working up the pipes at night. This can also contribute to throat cancer. If you have this trouble, and don't want to resort to drugs, go a little lighter in the dinner and a little earlier until the problem goes away. The worst symptom of this is if your eyes are itchy too - the acid will get into your eyes through the sinuses.

Soon I am coming up on my "Christmas Swim" at the shooting range where I take a rifle into the mud and slime of the slough near the shooting range and torture test it. Last time I did that my balls were in my neck. But I can see the value of cold where giving the metabolism a kick in the ass matter.



Orrrrrr you could just do something even simpler than following a diet.

You can go "ohai calories, how many have I approximately eaten of you today?" Then you can go "ohai metabolism, for my age, weight, and height, approximately how many calories have I burned?" Then figure out the sum. If positive, add exercise, reduce food. If negative, keep at same level (or lower exercise/food if too negative, or raise food/exercise if only slightly negative).

The only thing that matters with regards to weight is how many calories you eat and burn in a day. Not carbs, not proteins, not fats, calories. In fact, most people could do with skipping breakfast (because breakfast tends to have foods with large quantities of fats and carbs, which make those foods comparatively high in calories). Why are carbs and fats bad? They aren't, they just have calories, and foods that have carbs/fats tend to have many carbs/fats compared to how full they make you feel. Compare: a half pound of turkey breast to three slices of bread.

Metabolism is involved in weight, but is actually higher if you are heavier than it is if you are skinny/fit. It also does not change based on what/when you eat, unless you are starving yourself, where it shrinks as much as it can to accommodate.

@Herzog, I'm not really disagreeing with you, but besides protein being involved in muscle growth there is no reason to prioritize it for dinner. Really, losing weight and gaining muscle mass is surprisingly easy (unless we're talking (no steroids) bodybuilding, which is different).

Finally, at the OP: Don't sleep in the cold. Its unhealthy, dangerous, and is probably making you gain weight as your body isn't able to sleep properly.
Rodj Blake
PIE Inc.
Khimi Harar
#29 - 2011-12-13 16:27:57 UTC
Hieronymus Alexandre wrote:
Rodj Blake wrote:
31 degrees is pretty warm unless you're using an arbitrary system of measuring temperature.


You must be a space creature then; 31 Kelvins is rather chilly to us flesh-beings (not to mention 31 Rankines).


I said degrees.

Therefore I couldn't have meant Kelvins since the Kelvin scale is absolute rather than relative..

Dolce et decorum est pro Imperium mori
Slade Trillgon
Brutor Force Federated
#30 - 2011-12-13 17:36:22 UTC  |  Edited by: Slade Trillgon
Adunh Slavy wrote:
When air is warmer, it can hold a lot more moisture, that "sweat" has someplace to go, the moisture can escape your blankets/sheets and go into the warm air. When the air is cooler above your blankets, the water can not evaporate as easily, so it stays.

This is the same reason that there is dew and frost in the morning. During the night, the air temp drops, the water is forced out of the air and is deposited on the ground.

All that nice warm air under your blankets, in winter, holds all that water, sooner or later it gets saturated and it begins to "rain" under the blankets and leaves you all sweaty.


To give a name to the process described above.

Evaporative cooling, http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/sweat.html, is a very efficient way to cool the body. Bedding, sheets, and a shirt will keep the cool dry air from flowing over the body and wicking the moisture off the skin. This is why when working in the summer heat that you should not switch over to dry clothing during breaks as you have to then re-soak all that fabric before you start cooling the body at max efficiency. The rate at which you burn calories is effected highly by the ambient temperature.


As for the burning calories by shivering question, I found the following post, http://www.thenakedscientists.com/forum/index.php?topic=3326.0, which simplifies the concept pretty nicely.

Chris wrote:
Shivering is a very efficient form of heat production which involves burning energy in muscles to release heat and so warm up the body.

As you know, muscles can only contract and so they're arranged in antagonistic pairs around joints; that is, one muscle moves the joint in one direction whilst its opposite number moves the joint back the other way.

During a movement one of the pair of muscles is activated whilst its antagonistic partner is switched off until just before the correct joint position is achieved.

But when you shiver both muscles are activated simultaneously so that they work against each other. As a result there is little of no net movement of the joint, but a huge amount of energy is burned. As muscles are only about 20% efficient i.e. 80% of the energy they burn turns into heat, this is a very good way to warm the body.

However, I agree with you that shivering is probably not as good at burning energy as sprinting.

Chris



EDIT: All that being said, if you are shivering to the point that it is buring off a high number of calories it is likely that you will not be sleeping very well, which I believe to a very good reason not to do this. Just do an extra half hour of vigorous activity each day and you will be close to the same energy expinditure


Slade
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