Athletes using gear dont need to use the doses that bodybuilders use. The goal of an athlete is to get better at a sport. It doesn't take much to get faster or stroger. If you are a tested athlete, a whole other set of questions comes up when it comes to testing. You'd need to know how the detection time of a specific drug. Many athletes use their gear in the off season, getting stronger, then coming off before the season states, and continuing to work hard to maintain the added strength. Its a game of 3 steps forward, 2 steps back, ideally making more progress than you would have gained clean.
Short esters and orals are usually the fastest to be out of your system, to be off in time for on season testing.