We are often asked: Should I take my body measurements or is weighing better?
Successful weight loss is so often better shown by the monitoring of body measurements than by regular weighing! This is due to the relatively high protein content in our nutrition plans which helps rebuild connective tissue and muscles in the body. Muscle weighs more than fat, but also has less volume, i. e. it takes up less space than fat. So if 20 lbs of fat was lost and 13 lbs muscle gained, only 7 lbs difference may be seen on the scale. But if we look at body measurements, we often see reductions of 4-6 inches which is 1-2 dress sizes!
Metabolic Balance Blog 