Simply, eat for the body you want.      Nutrition is the cardinal component to a healthy lifestyle.  You can work as hard as you want in the gym, but if you don't have a proper diet you won't get as good of results.  You can still lose weight by the sheer force of exercise but once your body becomes adjusted to the exercise, diet will become even more important.     I struggled with my nutrition for too long.  I wish I would have gone to see a nutritionist...