How would I go building my body muscular?

I do Suryanamaskar daily morning; the poses which I was taught are like shown in this and which I do (“Surya” means Sun and “Namaskar” means a salutation). That’s a whole body exercise and really good; this saint: Samartha Ramdas used to do 1100 daily, and he was extremely powerful (stories say someone hit him with an iron rod on his arm, and nothing happened to him, except for the rod was bent/broken).

This helps me build me muscles, but I wonder how to be like Arnold Schwarzenegger. Are there any rules or something that I am missing? Are there any muscular men here on fluther who can tell me what to do?