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Actually the person who makes more efficient use of calories is more likely to become fat because they don't need as much. There's also a lot of evidence that burning through loads of energy will reduce your life span. Eating less is always better than trying to burn more.

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> There's also a lot of evidence that burning through loads of energy will reduce your life span. Eating less is always better than trying to burn more.

I would think that it is highly dependent on what you're burning the energy for... Surely if you eat more to maintain a fit body/lifestyle, it is likely to have a more positive effect on lifespan compared to eating less and living a more sedentary life?

Of course, an optimal balance needs to be struck between the two, but I am very curious on what the research says about this balance.

> Actually the person who makes more efficient use of calories is more likely to become fat because they don't need as much.

Only if they eat as much as someone who uses calories less efficiently. Which is not a given.

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