"Steroid Fatigue" Is a common catchphrase these days and refers to another function of estrogen in both the male and female body, namely its ability to promote wakefulness and a mentally alert state.With the availability of potent Aromatase Inhibitors, bodybuilders today are ,at times, noticing more extreme estrogen suppression than they had in the past. Often this suppression results in fatigue. In these conditions, the bodybuilder, though on a productive drug cycle may not be able to maximize his gains due to an inability to train at 100%. The reason is that estrogen plaays an an important supporting role in the activity of serotonin. Serotonin is one of the body's principle neurotransmitters, vital to mental alertness an the sleep/wake cycle.Interference with this neurotransmitter is also associated with chronic fatigue syndrome. These things may be important to consider when planning your next cycle or as I've seen here even your first cycle lol.
So what does this all mean to the bodybuilder looking to gain optimal size? Basically it calls for a cautious approach to the use of estrogen maintenance drugs if mass is the key objective. IMO when doing a cutting cycle many will use non-aromatizable compounds in lieu of AIs or serms. Obviously Ais should be used if there is a clear need for them due to the onset of estrogenic side effects. Gyno is certainly an unwanted problem for the steroid user as are noticable fat mass gains. BUT if these problems have not presented themselves , the added estrogen due to a cycle of test or Dianabol, might indeed be aiding in thee buildup of muscle mass, or keeping you energetic.