How am I gaining weight by working out?

[DebiW]

I have  been losing about 1 lb per week, so not too fast. I log everything I eat, eating the proper amount of calories, am eating low carb, healthy, whole foods, and drink a lot of water (about 80 oz per day). I work out 5-6 days per week with weights and cardio. 

I weighed myself before I worked out ( weights for 30 minutes, then elliptical intervals for 35  minutes), and had been at that same weight for several days. All good. I happened to weigh myself again after working out because I was wondering about waterloss/gain during working out. I weighed 8 lbs more after I worked out than I did before I worked out. Only difference was the workout and about 16 oz of water I drank while I worked out, and sweat.

It's now two days later, and I am still at that 8 lbs higher weight. What is happening? I don't understand. I know weight will fluctuate a few pounds because of water, but gaining 8 lbs during one workout, and staying at that higher weight for three days now? I am now back at the same weight I started at.  This is frustrating, and I don't know what to do about it. Help!

[emili]

@SunsetRunner- Whom are you commenting to?

[SunsetRunner]

Your question was WHO did I address?  I address anyone who wrote a question which interests me.  I have addressed some people who indicated they have an interest in acquistion of a higher level of fitness which may include factors such as weight inventory, excess post oxygen consumption, thermoregulation, hydration, exercise physiology, risk factors, health appraisal, safety, injury prevention, exercise programming, metabolic calculations.  Hope that helps.

[emili]

@SunsetRunner- so actually it would be WHOM did you address-  Perhaps you took my question to be rude, wasn't the intent. I was curious who you were responding to so I can apply your answer to the original context. But I am over my curiosity now, thank you.

[SunsetRunner]

Actually, I am brand new to this forum however the I notice the topic has replies and I click on the topic or question to see what the responses are.  For example, I noticed you commented on the weight of muscle.

Actually, as in most things, more complete answers resonate.  An example exists in that two people weigh exactly the same yet one is 40 and one is 65 years of age.  Retention of muscle mass or density will be more prominent in the 40 year old so his 3 pounds of muscle wil be greater.  If you know anyone over 65, I think you will find that physicality true.