it's the food, silly

Which matters more, diet or exercise?
For weight loss, the answer is...
Diet.

Exercise is important for a million reasons but, if you don't change your diet, it won't make you thin.

The brilliant minds behind the Mindful Muscle blog write about this in a post called When Exercise Doesn't Work.

It makes all the sense in the world. Changing our diet is simple and yet sooooo much harder than going to the gym.