Have you not read the article?
"I can't emphasize this point enough ? this strategy isn't for everyone. In fact, if you're closer to 20% body fat than you are to 10%, this strategy isn't for you at all. However, once you've figured out how to slowly and sanely whittle your fat percentage down to the "fairly lean" range (12% or less for men and 19% or less for women) and you've learned the habits that help you stay that way, that's when something like this can be a powerful weapon in your fat loss arsenal."