Is Weight Loss Always Fat Loss?
No. When we lose weight by burning more calories than we eat, we generally lose lean tissue as well as fat. Also, some of the weight lost will be water.
On the other hand, when we gain weight by consuming more calories than we burn, all this weight gain is fat.
So if we lose and regain the same weight over a period of time (known as weight cycling) our percentage of body fat steadily rises – which is bad news for our weight. Because a greater proportion of body fat means we need fewer calories, so it becomes easier to gain weight and harder to lose weight.