There was an article about exercise and weight loss in the NY Times three weeks ago. It dealt a lot with how exercise can make you so hungry, it can sabotage your weight loss efforts.
I can't post links, but here's an excerpt:
'At the same time, as many people have found after starting a new exercise regimen, working out can have a significant effect on appetite. The mechanisms that control appetite and energy balance in the human body are elegantly calibrated. “The body aims for homeostasis,” Braun says. It likes to remain at whatever weight it’s used to. So even small changes in energy balance can produce rapid changes in certain hormones associated with appetite, particularly acylated ghrelin, which is known to increase the desire for food, as well as insulin and leptin, hormones that affect how the body burns fuel."
For the whole article you can go to the NY Times website and search on the terms weight loss exercise.
I have encountered this many times -- some of my worst eating days are on my best exercise days.
My plan moving forward is to plan my entire day's menu in advance. Put it in writing. And not deviate. I'll let you know how that goes.