If I was a professional probably not. I have used steroids in the past with legal terms. I was prescribed injections of testosterone which is the male hormone produced by your body. Testosterone is considered the first basic cycle for someone that is looking to try steroids. As it is naturally occurring in the body, injecting preferred doses into your body from the outside will peak your testosterone giving you more energy and the ability to put on lean muscle mass fast. A lot of pros and people you hear about using steroids are on a grocery list of different kind of compounds that they would stack in a needle and shoot up DAILY. There is a lot of information on the internet regarding steroid use and how to go about doing it correctly and safely.
Pro Athletes that boost their testosterone with steroid injections are only boosting their testosterone. So in order for them to get caught they need to have a hormone panel done with blood work.. this is different then a drug test. When they get the results back from the hormone panel they are usually checking to see if the athletes hormone levels are way out of range indicating that they had used. However there are different esters of the steroid and they are able to get some that only last a day, so they have to inject daily but if they stop the next day their levels will be fine.