text: i would compare this to a stomach. from personal experience i do a lot of crunches but i still have a somewhat beer belly. the muscle embedded inside the fat which the fat is much bigger and on top. so when you burn the fat for energy/sugar it just goes away and the muscle there 'comes out.' anerobic exercise will def increase size of muscle :) this answer is prob very vague and disorganized but i believe the body works the same way all around.