Weighing before and after exercise

glassyo

Disclaimer: This isn't a being obsessive about weighing type thing.

Ok, so I weigh myself once a week always under the same circumstances (naked, after exercise and shower and bathroom usage) but, for whatever reason, started weighing myself before exercise and then my normal weighing after.

The thing is I noticed that I lose about half a pound between weighings. Now some might say that's sweat but I really don't sweat all that much. This is usually after long walks and maybe eating a little and after downing a diet coke from the Circle K.

Any other reason why the weight loss? It's pretty consistent. Even when I've gained weight, the number is lower on the second weigh in.

MikePTY

Sweat is the likely answer. If if you feel like you don't sweat a lot, your body is always sweating. Every minute of every day. That's why we need to continue to hydrate regularly. Even if you don't get the sticky kind of sweat that others talk about, your body is still burning water. I usually lose about 1-2 pounds from exercise.

A portion of it will be from the calories you are burning tho. Let's say you burn 350 calories while exercising. That's 0.1 pounds. So about 20 percent of your loss would be related to actual fat loss that occurs during that time. But most of it is likely sweat.

NovusDies

I hate to ask the obvious question but are you using the restroom between weighing?

Azdak

You shouldn’t weigh your self after exercise. It is normal to lose water during a workout and it will skew your results. I routinely lose 3-4 lbs of water weight during a 45-60 minute workout. Ive seen people lose as much as 7 pounds.

Weighing first thing in the morning, without clothes, and after bathroom will give you the most accurate and consistent results.

AnnPT77

Keep in mind that you exhale water (as humidity) in addition to exhaling most of the other waste components of food/stored energy that you burn: It's not just sweat that's involved.

glassyo

I'm an idiot. It's probably a little of everything everyone mentioned but, uh, @NovusDies may have had a point. I was going to answer "not every time" but realized I'm like Pavlov's dog when I'm like 10 minutes from home and, drink or not, when a girl's gotta go...

Mazintrov13

I do this as well, weigh before and after exercise, and am always down about 0.3 kg (about 1/2 a pound) after. I assume it’s sweat

koalathebear

Our scales are in the bathroom so I weigh myself all the time, although only record in MFP once a week. I usually weigh myself before breakfast, after exercise. In the scheme of things, it doesn't really matter for me because fro whatever reason, my weight fluctuates during the week and tends to level out on the weekend... I also often have different weights before and after a shower so I tend to not be too fussed about the number on the scale unless I've seen it there a few days in a row.