Can someone explain'water weight'?

Most fun foods and unhealthy foods are high in sodium, excessive sodium causes a fluid shift in your body and tells the body to retain and hold onto fluid (water). When people are eating healthy they likely have a diet that is low in sodium by default verses a fast food diet that will overload your body with excessive sodium. When you eat healthy for an extended period of time and you are drinking water and eating lots of protein, veggies and fruit, then you are not ingesting a lot of sodium. When you go off eating that healthy diet and have a cheat day or week then you likely are eating "bad" foods that are higher in sodium and fat and this you retain a good amount of water due to sodium. Once you go back to eating more healthy natural foods you don't retain the 'water weight' and you loss the few lbs of bloat.

I just googled it.... It seems that glycogen is 4 water molecules, so when you gain a glycogen you also gain the water molecules, and losing the glycogen loses those attached water molecules.... If Google was telling me the truth. ( there was more to the explanation, but this was the part my brain needed)

That and electrolyte imbalances especially sodium. You only gain glycogen and water if you body thinks your muscles are depleted or you increase exercise and the body chooses to store more fuel, but not 20 pounds worth.

How do you know if some or all is water weight? By measuring your body fat and by using common sense as to how much you have overeaten or how much salt you have consumed. It's virtually impossible to gain 20 pounds of fat in a few days, that would be somewhere in the region of 70,000 extra calories consumed.

Water is used to balance the amount of electrolytes (sodium, potassium, magnesium, etc.) inside of and outside your cells. A fluctuation in sodium intake (not necessarily a "high" intake per se) may cause you to retain water to bring your electrolytes back into balance.

You know it's water weight if it only hangs around for a week or two after you resume your typical diet. If it lasts longer than that, it's probably "real" weight.

Water weight can fluctuate quite rapidly, 10 lbs in a day is not uncommon depending on the size of the person and other factors.

It's probably more useful to call it "water retention." It is the abnormal accumulation of excess fluid in the circulatory system or the tissues or cavities of the body. There are many causes. Some are related to inflammatory processes like histamine or the repair of tissue. Some causes are hormonal. It can be caused by the kidneys, cardiovascular system, protein levels. If you quickly gain a large amount of weight when eating out it is from over-consumption of sodium. This is common and temporary. As long as you return to a lower sodium diet this weight should come off within days. You can speed up the process with a diuretic or with foods that have have a diuretic effect but that is generally unnecessary unless you have high blood pressure.

It sounds like your friend gained both water weight and fat. It's very easy to over-consume much more than we think during the holidays. Whatever doesn't come off after the first 2 weeks of changing to a low sodium diet is mostly body-mass.

Listen to the guy with the tie and this:

This explains it

http://www.justinowings.com/understanding-bodyweight-and-glycogen-de/

Things I can think of that make you gain non-fat weight:
excess salt (we need a certain amount in our bodies)
carbs (which turns to glycogen quickly, and if you exercise allot, the more the merrier)
exercise (while repairing muscles)

My biggest weight gain over night at 5'7 and 120lbs was about 10 lbs after a particularly steep 16km hike. I was still on a calorie deficit so over all I didn't gain any weight by the end of the week, but I ate extra carbs from the calorie burn, and I hiked 16km. I'm glad I did all those things because I was quite pooped out, and I probably would have injured myself if I hadn't have had the extra fuel (lack of fuel=easy injury times).

Maintaining muscle can keep good weight on. By volume, fat weighs more then muscle. If we have the same weight of fat and muscle, the fat will be bigger. Many of us think we have to get rid of 'weight' to be healthy. That is wrong. I'd rather be a skinny girl with muscles then a skinny thicker version thats all squish and slightly lighter. I gave my 30lb more then me friend who's been going to the gym regularly and lifting weights and after losing 50lbs a few of my dresses and she didn't understand how she fit into them. This is why.

Ways to gain fat
1lb fat =3500 calories
When we gain weight we gain a ratio of muscle and fat
You have to eat over 3500 calories over your EE (energy expenditure). For those of you who know, you can estimate your TDEE via your BMR and activity level. Add 3500 calories on top of that and you still haven't likely gained all fat.

The effect of salt is overrated, though, compared to the effect of carbs. For the vast majority of people, easing up on sugar and white flour will make sodium a non-issue.

Vast majority? I don't know. It certainly depends on the individual's sensitivity to salt and where they are coming from as far as a diet. If someone is very insensitive to salt with a diet rich in refined sugar & carbohydrate then OK. Is this the "vast majority" of the population? I'm not sure.

If we look at the population most sensitive to water retention (people with all kinds of high blood pressure) the opposite is the case. For these people sodium intake is the main concern and source of advice from their doctors not sugar or carbs. Personally I find that very telling.

Certainly both cause water retention and from an intuitive standpoint I'd assume most people lie somewhere in the middle as far as sodium sensitivity. Given the standard western diet is sodium and refined carb and sugar rich I think it's hard to argue either as a non-issue.

Thanks for all the info.
I knew of sodium and the glycogen, slightly, but had not thought of the muscle repair type stuff. Makes sense though.

muscle repair=glycogen rushing to those muscles to repair. Glycogen = type of fuel that travels around helping the body.