Dr. McDougall's Online Discussion Board

But apart from burning unwanted fat, dieters now have another reason to work out because scientists have discovered that physical activity makes low-calorie foods appear more appetizing.
Scans taken after volunteers jogged for an hour showed that the brain’s ‘reward centres’ lit up when they were shown images of low-fat diet foods.
But the same brain regions showed reduced activity when volunteers looked at pictures of calorie-dense fatty foods.
The findings, by a team of researchers at the University of Birmingham, suggest that exercise has the power to help change eating habits as well as shed fat.

Learning wrote:I think this has always held true for me. I can’t think of many people over the course of my life that wanted to eat a steak dinner after an aggressive run. I can think of a lot of people that have told themselves they need to eat a high protein meat based meal after heavy lifting. But even after heavy lifting the last thing on my mind is a heavy meal. Whether I run or lift I still want something healthy afterwards, which equates to a per se low cal meal. To the other point, inactivity seems to foster a craving for heavier foods, calorie-dense.