The most commonly used AAS in medicine are testosterone and its various esters (but most commonly testosterone undecanoate , testosterone enanthate , testosterone cypionate , and testosterone propionate ),  nandrolone esters (most commonly nandrolone decanoate and nandrolone phenylpropionate ), stanozolol , and metandienone (methandrostenolone).  Others also available and used commonly but to a lesser extent include methyltestosterone , oxandrolone , mesterolone , and oxymetholone , as well as drostanolone propionate , metenolone (methylandrostenolone), and fluoxymesterone .  Dihydrotestosterone (DHT; androstanolone, stanolone) and its esters are also notable, although they are not widely used in medicine.  Boldenone undecylenate and trenbolone acetate are used in veterinary medicine . 
It was decades later that the secret behind this spectacular success became known. The East German Sports Federation had, with the help of the Stasi, used Performance Enhancing Drugs or PEDs to ensure that their athletes gained international recognition by winning the Olympic events. This systematic plan had been initiated in 1974 as a means to guarantee international glory through the achievement of gold medals at the prestigious sporting event. Oral- Turinabol , a testosterone derivative was used extensively to improve muscle mass and cut down recovery time. This allowed the German athletes to train harder and longer than other world athletes.
Whether you want a Testosterone Cycle, Cutting, Bulking up or a Weight Loss Cycle , you should make the right choice before you start. Make sure that you decide if you want to cut, lose weight, or gain muscle. Maybe even lose weight and gain muscle all at the same time.
A healthy diet along with a good protein supplement will greatly improve performance in any good Cycle. Remember that by losing fat around the body you will increase your strength to mass ratio and improve lean muscle tissue, giving you that lean physique appearance.
Bulking and Cutting Cycles - Those individuals who already have a lean physique wont achieve fat loss gains as quickly as those with more weight and therefore would more than likely opt to go for a combined all in one Bulking and Cutting Cycle to start with.