Skin fold testing only estimates the least troublesome type of fat. Subcataneous fats are not generally the *main* issue for health, rather it is the internal fats around and in organs that causes the main direct risks to health.
Sounds realistic from a medical perspective, but since you are building and losing equally everywhere (I assume, since you can't direct where your body stores fat) I would say that monitoring "external" fat will also somehow monitor "internal" fat?
