Dehydration: I dropped 2.4 lbs during 6 mile morning run.

I have dropped 7 pounds on a 10 mile run at about 80 degrees.

That's normal for me - I easily drop 5 pounds in the early morning humidity for 10 miles...it seems to level off there though, even for longer runs...I'm 140 lbs.

I routinely drop from 136 to 132 on 60-90 minute workout days in the summer - not a big deal.

I drop around 6 pounds on every summer run.

I'll never forget on a long run a few summers ago.. It was 95 and HUMID! and the last 20 minutes I was dehydrated and stumbled back to my car almost passing out.. weighed myself when I walked out of my door, 148, came back at 139.. probably the extreme, but regardless DRINK UP

joiwef wrote:

I have dropped 7 pounds on a 10 mile run at about 80 degrees.

Same for me recently, dropped 7 pounds in 10 miles and it wasn't even a hot day. I was wondering why I was feeling so tired in the last few miles since my pace was not hard?

How many calories is that worth? Must be a lot?

I had a similar experience. I'm a big guy and lost about 10lbs on a run....very dizzy, lightheaded, etc. Not a good situation. 2.4 lbs doesn't seem to be too much.

Wow. You are a pretty heavy sweater. I weighed myself this morning before and after a 9 mi easy run. 79 deg, 75 dew, 90% humidity. I went from 142.6 to 141. I guess I have acclimated to this weather.