Does it Work? Yes - but you need to do a LOT of it to see any real results.

A research team from Canada tracked 52 obese men for three months. They split the men in two groups: Diet-only and Exercise-only group.

Both the diet-only and exercise-only groups created a caloric deficit of 700 calories daily. In other words, each day, the diet-only group ate 700 calories less than normal. The exercise-only group, on the other hand, burned an extra 700 calories daily by walking on the treadmill.