When building muscle and losing fat, the scales can be deceiving! A much better measure of progress is to track body fat. A very efficient, easy and practical way to measure your body fat percentage is through skin-fold measurement.
This personal body fat tester is a precision instrument that has shown in clinical trials to be closer in accuracy to the "gold standard" of underwater weighing then any of the more elaborate methods of measuring body fat (without the inconvenience, expense, trained personnel and lack of privacy these methods entail).
It’s small, easy to use, and allows you to reliably track your progress.