Anabolic androgenic steroids (AAS) were initially created for therapeutic purposes, and synthetic derivatives of the male hormone testosterone. Due its great anabolic effects, these drugs are being used on a large scale, for the improvement of sports performance. In this present study, we aim to show the history of it’ use, present their mechanisms of action, more particularly its use correlate with improved body composition, muscle mass, aerobic capacity and verify their possible side effects, analyzing their use therapeutic and indiscriminate, through direct scientific research with the sports. Sources were reviewed scientific the following search engines: PUBMED, LILACS and SCIELO. The results showed that in presence of a suitable AAS and diet can contribute to increases in body weight, particularly lean body mass and muscle strength gains achieved by high intensity exercise, these effects can be further potentiated, the use of supraphysiological doses, but in the aspect of aerobic power, there are not scientific evidence to support their improvement. Regarding side effects, the use of AAS, is related to several complications in the liver, cardiovascular system, reproductive system and psychological characteristics, always assigned by the non-therapeutic and abuse of AAS. Thus we conclude that the use of AAS, are directly linked to gains muscle mass, strength, as well several side effects, always assigned to abusive and indiscriminate doses, it is noteworthy that the scientific literature, still has a certain lack of studies, mainly randomized, controlled, with supraphysiological doses in human, so many effects are still unknown.
As castration has received criticism in recent years, due to welfare reasons, some producers and producer associations are seeking alternative methods to control boar taint.  Some producers are breeding out the taint and avoiding the few breeds of pigs that are high in taint. Yorkshire, Hampshire and other lighter colored pigs are known to be particularly low in the androstenone based taint while Duroc pigs are high in the taint. [ citation needed ] When pigs are raised on pasture in a rotational grazing system, similar to cattle, goats and sheep, the skatole based taint does not occur because the pigs are on fresh ground and not inhaling and eating their own feces.  , unfortunately this pasture grazing practice is not conducive to commercial pig production.
Additional reason the STEM System cannot magnetize materials is that because the field alternates between positive and negative polarity with time, the average field strength is zero. The magnetic source used in the STEM System operates at or above ~8,000 Hz, so the field polarity changes faster than every ~125 microseconds. Any material will see a zero average magnetic field and no magnetization will take place.
Why is the STEM System's magnetic field safe? Research data shows that the magnetic field generated by the STEM System is lower than the most stringent government exposure standard. Magnetic sources used in the STEM System are wound coils designed to emit only magnetic field energy. The STEM System generates pulsed AC signals at frequencies of 30 kHz or lower and the electric field power is more than 60 dB below any exposure limit.
Is the STEM System compatible with the Razer Hydra? Content for the Hydra will be supported by the STEM System. You will also be able to use a Hydra and a STEM System simultaneously on the same host PC. This means that Hydra users can add head or body tracking for VR.