All of them go gyms, and usually all gym instructors outline a detailed diet plan for their clients according to their body type and body goals. So this is utter rubbish that we eat everything and whatever and still be fit and have a TONED body. You have to do specific exercises and specific food sometimes.
High metabolism rate is another factor but it can only help against weight gain and fat. It won't make your body toned and curvaceous like actresses.
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