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Working out and rapid weight gain? What gives?

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I had an awesome workout yesterday. Great leg work with my trainer, some light arm work, 5 minute warm up just to get my heart rate moving and a 20 minute cardio on the treadmill. I also did really well on my calories. So....

......why was I 125.2 yesterday and this morning I am 129.2!!!

I would love input from anyone who has experienced this or anyone experienced at working out who knows why this is. Logically, I am aware that I could not have actually gained 4 pounds in one day. I did not have lots of sodium, I drank plenty of water, it's not ttom....what gives?

I would much prefer a 4 lb drop! Oh, and I know it's not about the numbers on the scale, but I am looking to understand what is happening to my body.


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it's just water weight, don't weight yourself everyday just once a week on the same day. your weight will fluctuate daily
Is this really common when you start weight training? I don't want to be obsessive, I want to understand how my body is working. Everything I have pulled up on the internet says something different.
yeah it's normal. your muscle will retain some fluid(mostly water) to help repair the tissue.
i had an amazing day working really hard on the weights yesterday and i, too, gained over a lb today. Its no big deal. Your muscles are swelling and retaining water as they repair themselves. I agree with the idea of weighing yourself once a week. Don't stress, you're fine! and congrats on the great workout!
Also remember that muscle weighs more than fat, so as you gain muscle you will gain a little weight until the more muscle starts burning the fat! Laughing
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Original Post by vicki8seekers:

Also remember that muscle weighs more than fat, so as you gain muscle you will gain a little weight until the more muscle starts burning the fat! Laughing

 Oy, for the 1 millionth time, muscle does not weigh more than fat.

Muscle is denser than fat, so a pound of muscle takes up less space than a pound of fat does. 

I know it's something stored in the muscles (Is it all water? glycogen?) that increases the weight.  It happens with any exercise, but probably more with weight training.  I run, and when I stop running for a couple of days, I invariably lose a couple of pounds.  When I start up again, the weight comes back. 

I know it sounds weird, but now when I weigh less, I know I need to work out more! :)
wow..i needed to see this too!!  i have followed suggestions on this site and started to do strength training...and i hvae been one day on and one day off.and then after a real great work-out yesterday, i weigh in this morning 6 friggin lbs. heavier!!  and i freaked but thanks to seeing what others have said and doing ok head wize right ill keep day at a time.......and i guess the salt isnt a good thing.i didnt think iwas using alot, but maybe i need to cut down and drink even more water.......but at 56 yrs. old.......i cant go too far from a "restroom"  lol.........thanks D
Me too!  Today I was up a pounds to 115.8 from 114.6 do you know how depressed I was.  I worked put fro about an ohur yesterday.....and whooo 1 pounds up.  Blah.
d84 - Oy, for the 1 millionth time, muscle does not weigh more than fat. Muscle is denser than fat, so a pound of muscle takes up less space than a pound of fat does. 

This is a  very weird statement, youve just critised yourself. Of course a pound of muscle doesnt weigh more than a pound of fat they both weigh a pound, same as a pound of lead weighs the same as a pound of feather. But by volume (density) muscle weighs more than fat. A litre of muscle and a litre of fat do not weigh the same. Think you need to check your statements before you scream at people.
Is there anyway to reduce the strain/damage to muscles or help them repair faster. Would eating more protein help to provide the nutritiens to rebuild?

some helpful information on how the weight on the scale is not always the best choice: eight/scale.htm

Hi taylorn24:  I went through the same thing and it's true.  Your muscles are just getting ready for the next workout.  I finally broke the "water barrier" which was creating a plateau for me by drinking a lot of herbal decaf teas.  I am perpetually dehydrated cause I just can't stand water but the tea did the trick.  Of course, I would hang close to a bathroom - LOL.  And from what I understand, and you guys correct me if I'm wrong, you need to be drinking stuff that is not carbonated.  I tended to drink a lot of alcohol - (okay, I know that's not a good idea) but I drank it mixed with diet, carbonated mixers.  So now at night I make a whole coffee pot of decaf herbal tea and drink that.  I use the "Sweet Dreams" Bigelow tea but there are an amazing number of flavored teas out there.  I do cardio everyday, if at all possible (treadmill) and do the weights every other day.  I'm not doing anything particularly high intensity on the weights, just trying to tone up but I see the fluctuations when I do it.  Good luck and don't get discouraged.  As a friend of mine said (he had lost LOTS of weight), even if you don't lose a lot of weight, you will be healthier in the end anyway!!  Have a great day - it's going to be 75 degrees here in Virginia!!!!  Love it!!!
Not carbonated, eh?  Does sparking water really not count? I don't like plain water much, so I either drink water with lemon or with bubbles.  I see how Coke would be a problem (calories, diuretic caffeine), but why would regular sparkling water be a problem?
there have been some resent studies that have proved that you will still get hydrated from carbonated waters, so don't worry about the water, just the cokes and Pepsi's
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One other thing that's important to realize is that fat gain (which is the only weight gain we care about) is a SLOW and GRADUAL process. Just like you only lose ~1lb of fat a week, you don't gain it that fast either. So if you're seeing your weight change by 6 lbs over the course of one day, there is absolutely no reason to freak out because there is no way it is fat.

Also -- you know what you ate, right? While the human body is a bit difficult to understand, this is science after all. If you ate a reasonable amount, AND worked out, there's again no reason to expect that you gained fat -- much less 6 lbs of it. Maybe if you ate a little more than you should have you gained 1/4 lb, and even that would take a lot. A little intuition goes a long way to preserving sanity, especially if you're going to weigh yourself every day.
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i realized i am facing the same problem with you. when i finished my cardio exercise i hope to see a drop in value when i step on the weighing scale. but instead there is a gain in weight.

after my cardio exercise, i dun usually take alot of water. the most i consume after my exercise is 500 ml of plain water ...  

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