Injectable steroids are injected into muscle tissue, not into the veins. They are slowly released from the muscles into the rest of the body, and may be detectable for months after last use. Injectable steroids can be oil-based or water-based. Injectable anabolic steroids which are oil-based have longer half-life than water-based steroids. Both steroid types have much longer half-lives than oral anabolic steroids. And this is proving to be a drawback for injectables as they have high probability of being detected in drug screening since their clearance times tend to be longer than orals. Athletes resolve this problem by using injectable testosterone early in the cycle then switch to orals when approaching the end of the cycle and drug testing is imminent.
I usually do my sets of heavy chest work (usually dumbell presses but sometimes bench press), then an extreme stretch on a flat or slightly inclined bench for as long as I can take it with some dumbells that are just a little heavier than what I would normally use for flyes, and then a few sets of high rep cables and or flyes from a few different angles (if I am using the cables I will set it to the top, middle, and bottom for one set each) to try to really pump the muscle as full of blood as possible once it is stretched out and damaged. It has really helped to give it a more rounded and prominant appearance to help balance out my much larger back/shoulders.