Speeding up your metabolism and achieving your weight loss goals involved a certain degree of focus; after all, there's a lot of things competing for your attention (including that delicious Chef's Special pecan pie!), and you certainly need to be able to keep your eye on the goal in order to maintain your program.
Yet sometimes too much focus can be a bad thing; and some dieters understand this all too well.
Remember: speeding up your metabolism is a holistic effort that includes exercise, lifestyle, and diet changes.
Focusing on only one of these at the expense of the others (either one or both) can be detrimental. In fact, in some cases, it can be counter-productive.
So the myth here is that you shouldn't go all out and focus on becoming an exercise guru, and then move onto lifestyle, and then to diet.
You have to integrate all 3 aspects into your life at the same time. True, based on your unique situation, you will likely emphasize one more than the others. That's fine and normal. But it's a myth – and a mistake – to ignore any one of these.
It takes all three to speed up your metabolism, and to get you to your weight loss goals for the long-term.