
Originally Posted by
rxarms
Androgens do the following: stimlation of protein synthesis and the consequent increase in skeletal muscle mass along with retension of water, nitrogen, and such ions as calcium, sodium, potassium, chloride, Since skeletal muscle does not contain specific receptors for androgens it has been proposed that adrogens may exert their anabolic actions in muscle by competing with glucocorticoids for their cytosolic receptors, thus inhibiting or preventing the catabloic actions of the glucocorticoids. On a side note since stress, increases cortisol levels in the body, it follows that a constant worry is bad for your muscles.
On the genetic level, steroids bind to a receptor, on binding ligand, this activated complex can interact with chromatin and regulate transcription of target genes. This means more protein sytheisis, the cell factory goes into over drive. You start making more of everything even cancer cells if you have some. Not a good thing at all. Actually it's pretty bad if you have cancer in the family or prostrate probems, but thats another story. So if you sit on your ass and load up on steroids you will grow and get big. If you work your muscles you will grow expotentially more. Why? Another big mystery but working the muscle and increase activity of cells is thought to increase the turnover rate of available receptors to activated receptors. More receptors more protein synthesis. So to maximize your gear you must work out. I think you asked how does a muscle get stronger? It has been awhile since I read up on this, but I think there are tiny fibers than contract within the muscle. A stronger muscle has more of these fibers. You can't build more muscle cells, but you can build more of these tiny fibers and that is how you get stronger. Once again a little rusty, but I think I have the basic principle. Amazing stuff isn't it?