In an attempt to add muscle I recently went from the traditional 10-12 rep sets to a heavier 5-7 rep sets. I also increase my calorie intake from 2700-2800 to 3300-3500. I am taking in approximately 240-260 grams of protein keeping may ratio at 30% proten, 40% carbs, 30% fat. My problem however is that I have lost weight from 179 down to 174 during this time. I don't appera to be losing any muscle as my muscle seems to be remaining pumped and if anything increasing. Being that muscle weighs for than fat how is it that I have actually lost 5 pounds?