First I know about the web site you can go to for this. They show injecting in the side of your arm for your tri. I talked to a guy who has been doing this for a while, he sayd to never inject the side always the bottom or back side of your arm. He said to put your hand on the back of your head. Your arm is going to be up where you can see the back . Now take the needle and go in on a 45 deg angle on the back side . You insert about a 1 1/2 above your under arm at the 45 deg angle. Has any one else done it this way or know of a better way for this . I would like to inject my tri 's to see if it will help get some more size.![]()