That is very interesting.
I will have to dig up some of my old physiology and biomechanics texts to see if that info is there.
ok, just dug something up :
the density of fat weight is about 0.90g/cc
the density of fat free weight varies from about 1.2g/cc to as high as 3.0g/cc with an average assumed to be 1.10g/cc.
so there is a 0.2g/cc difference. I have no idea if that is a significant difference or not.
In reference to this:
|I should get that book from the library so I can quote from it in this thread. She does some sort of calculation, perhaps using pounds per square inch of both muscle and fat and the muscle is a bit heavier per square inch, but only marginally so--certainly not enough to blame a scale that won't budge on the fact that you're gaining heavier muscle tissue
there has to be some other factor to account for not seeing the scale budge. Possibly an increase in bone density, since weight bearing activities do increase bone density, but I imagine that would be neglible. I do know that muscle stores glycogen(its storage form of carbs) and that to each gram of carb there are 3 grams of water attached to it. So that would make sense, when you add a pound of muscle, you add 3 pounds of water with it. Or therebouts since many things affect the water composition in our body.