4banger said:my gf is pre-med at BU and she told me that any use of AAS will have no effect on the growth of your heart or any other internal muscles...there are two types of muscles in the body, smooth and striated(sp?) dont flame me if i get them mixed up but i THINK smooth muscles are what makes up your heart, liver, brian and other internal muscles in the body while striated muscles are what make up your arms, chest, legs. etc etc...difference between them is that you can control striated muscles (flexing of chest, and bis....etc) while smooth you cant control...the ONLY muscle in the body that i know of that is made up of both is the lungs...you can make yourself breath faster and slower so i think mabye the lungs are the only internal muscle to be affected by AAS...only thing that can make heart bigger is cardio and other stuff like that
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