Diet control is more effective for many reasons. First, people often reward
themselves for their exercise with an indulgent treat, and end up consuming
more calories as a reward than the exercise burned in the first place. As a
result, calorie intake and exercise often increase together, even with the
best intentions. Second, people generally overestimate the amount of
calories burned during exercise and underestimate calories they eat.
*Muddled thinking is fuelling obesity epidemic*