Exercise makes us feel good, it burns off calories and helps build up an appetite. But according to new research, the latter may not be entirely true.

Researchers from Brigham Young University in the USA measured the neural activity of 35 women while they viewed food images, both following a morning of exercise and a morning without.

They found their response to the food pictures decreased after the brisk workout.

While this study looked at vigorous workouts (research does show light exercise increases appetite) this is one of the first studies to look specifically at neurologically determined food motivation in response to exercise.