Some bodybuilders and athletes use trenbolone esters for their muscle-building and otherwise performance-enhancing effects.  Such use is illegal in the United States and many other countries. The DEA classifies trenbolone and its esters as Schedule III controlled substances under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia . 
A total anabolic steroid cycle can last anywhere from 8-16 weeks most commonly, and in some cases, especially in hardcore circles even longer. As for the Trenbolone Enanthate cycle, 8-10 weeks is about all you'll want if your health is to be maintained. For off-season periods of use, the compound can be added in at any time, the frontend or backend of an off-season plan is fine. For some, switching back and forth between Trenbolone and Nandrolone compounds can be a great way to go. For the cutting phase, this is where a Trenbolone Enanthate cycle will almost always be best served at the backend of a plan. You will get more out of this steroid once you're already somewhat lean when it's being used for cutting purposes.