I did a little but more of an intense run yesterday, my legs aren't really sore, but I can kind of feel it when I climb our stairs in the house.
Anyway, today is my official weigh in day, which I weighed in at 151.2. Yesterday I guess I couldn't wait to weigh and jumped on the scale! It was 150.4 yesterday.
Almost a pound up. Nothing else would have caused it. (TOM, salt, eating late, not um...going) I know muscles can kind of retain water in a way when repairing, but is it noticable on the scale?

Anyone else notice this?

Yes! Definitely! It works the other way around too. I was sick and couldn't work out for 4 days straight. I actually lost weight on the scale and I attribute that to water weight and perhaps some loss of muscle? Not sure. Anyway, it's a good thing to know because many people get so upset when they see their scale go up or not go down as they're building muscle that they get frustrated and quit their entire diets. That's why the scale isn't the best short term indicator of fat loss. You just gotta hang in there.

Do you drink a lot of water after a run, because I do! That could maybe be part of it.

absolutely it's measurable on the scale, particularly since your quads are one of the large muscle groups.

this is how sometimes you'll look at yourself in the mirror and think "damn, girl, you look FINE!" but when you get on the scale to see how much you've lost, you've either lost nothing or gained a bit.

If I don't drink enough water after one of my weight training sessions then I always see a gain on a scale.

If I'm super sore and jump on the scale, I also see a gain.

Jup, like the others said. If I don't drink enough water after a hard workout I see a gain and after strength training I oftentimes see a gain. Though after swimming I see a loss, since it kinda dehydrates you some. Hihi.

What seems to help is really eat/drink a high protein something after intense workout. It speeds up the healing process and I barely ever have muscle soreness anymore. And no muscle soreness means no/less waterretention in the muscles.

Yup that totally happens to me. Yesterday I ran 2 miles, biked 15 and then did about 20 minutes of obstacle course work to train for an upcoming race. I woke up feeling all svelt and stepped on the scale to a 3 pound gain. And about 27 bruises.

Absolutely. I workout a lot so I don't notice it often- but if I'm extra sore one day- I don't even bother with the scale that morning because I know I'll be up SEVERAL lbs. ;-) Give it a day or two and stay hydrated!

Yes indeed. Short term I see gains, and sometimes long term trends too, if I am focusing on working hard and building lean mass. Very normal to retain some water weight as the muscles repair and heal themselves.

yep. it's water weight! your muscles retain water while they heal and rebuild themselves.

Thank you everyone! I was running regularly until maybe two weeks ago. In an effort to get my husband active, I traded in my running time for family bike time. So for the past two weeks, my activity has been biking only. I went for a run for the first time yesterday. 3.5 miles, which is a little less than what I was doing. I felt surprising good, guess the biking helped (versus two weeks off of doing nothing).
So maybe it was the day back to running.
And yeah, I felt all good and then I go and get on the scale and I'm like what?!?! LOL!

Oh, and BTW, it did help making the effort to do an activity he can join in on. The occasional traded run for a bike ride is worth motivating my husband!