as far as i know there are 3 types of muscles: skeletal muscle, smooth muscle and cardiac muscle. the heart is built from cardiac muscle and it is involuntary excited(you don't flex your heart or something in order to beat

). the skeletal muscles are valuntarily excited. i think these cells are not the same at all. i might be wrong i don't know...
as far as i know clen can cause some heart problems like aritmia but i don't know for heart hypertrophy. do you know drug that might cause this. i was thinking - eq increases the red blood cells. red blood cells occupy about 40% of the volume of the blood(this is called hematocrit). So does this mean that the total amount of blood will be increased as well? when there is more blood it follows that the heart has to pump more blood, so it has to be stronger. does this mean bigger though? i will have a look at the studies stupidhippo gave sites for instead of talking bs on the board(though i think some of the bs is correct

).
waiting for more input...