Imagine two people following the same meal plan with a calorie surplus. One lifts weights and the other doesn’t. The one not lifting weights gets fatter. The one lifting weights not only doesn’t get fatter, he gets more muscular by eating more! This partitioning of calories and nutrients is even more interesting in the other direction. Two people go on the same meal plan in a calorie deficit. One person is lifting weights and the other isn’t. Since the laws of thermodynamics can’t be violated, you know they’re both going to lose weight. The real question is: What kind of weight will they lose?
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