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So what? Fat people running a marathon does not change the fact that calories in/calories out is, not the most effective, but the only way how this works.

Any diets, workout routines, lifestyle changes, etc. will change in input/output ratio that will give different results.

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>Fat people running a marathon does not change the fact that calories in/calories out is, not the most effective, but the only way how this works.

No, it's actually not. From TFA: "Still, further research has shown that calories eaten are only part of what determines weight. Our metabolism reflects an interplay of things like genes, hormones, and the bacteria that populate the gut, so how much energy we absorb from what we eat varies from person to person."/

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