All these facts, myths, and rules of thumb depend on the operating definition of "fat" as well as what group of "fat people" are being analyzed. People who are medically "overweight" or "obese," meaning having a BMI over 25, eat more on average than those with a BMI under 25. I would consider exercising and eating to be of tantamount importance in correcting this, but certainly genes and upbringing can instill a predisposition to obesity or even hinder sincere efforts to lose weight.
However, I think what the article is talking about is skinniness as opposed to being "chubby" or "soft," not flat out obese. If you're somewhere in the region between "skinny" and "chubby," but not near being under- or overweight, then what you eat and how you exercise is important; even subtle changes to your routine can have noticeable effects.
However, I think what the article is talking about is skinniness as opposed to being "chubby" or "soft," not flat out obese. If you're somewhere in the region between "skinny" and "chubby," but not near being under- or overweight, then what you eat and how you exercise is important; even subtle changes to your routine can have noticeable effects.