Just to see, I decided to weigh myself before and after exercising this evening. My workout was not very strenuous: 2 miles running, 1 mile walking, plus warm-up and cool-down. Took 43 minutes. Temperature was somewhere in the 70s, with normal humidity and a light breeze.
I lost nearly a pound. 13 oz of water evaporated from my body. To recover this, I need to drink 1 2/3 cups of water. Not too bad. I definitely don't need to chug down on my liter-sized Nalgene bottle. It will be interesting to check this again, once the summer heats up a bit more, and I'm running more vigorously.
I'm cooking Emily's Black Bean Burgers this evening as a test run for the 4th of July pool party. I crunched the numbers to discover that they have 195 calories per burger. Plus, if you will excuse the expression, a s#!tload of fiber. :)