Keep in mind that using enanthate this way will cause a significant build up of testosterone in the bloodstream that will not cease to increase until four or five weeks of injections. This is due to the fact that taking a four hundred milligram injection, and another four days later, still has at least 200mg working from the previous dose. The third injection then adds another four hundred and the first is still not entirely used up. You may realistically have over a gram or so in the bloodstream before you know it. Just be careful, and keep this in mind when figuring out your dosages.
The second theory is similar and is known as "evolutionary neuroandrogenic (ENA) theory of male aggression".   Testosterone and other androgens have evolved to masculinize a brain in order to be competitive even to the point of risking harm to the person and others. By doing so, individuals with masculinized brains as a result of pre-natal and adult life testosterone and androgens enhance their resource acquiring abilities in order to survive, attract and copulate with mates as much as possible.  The masculinization of the brain is not just mediated by testosterone levels at the adult stage, but also testosterone exposure in the womb as a fetus. Higher pre-natal testosterone indicated by a low digit ratio as well as adult testosterone levels increased risk of fouls or aggression among male players in a soccer game.  Studies have also found higher pre-natal testosterone or lower digit ratio to be correlated with higher aggression in males.     
As the only steroid in the course, but the best effect is achieved when combined with other drugs. Start using anabolic agents athletes may recommend a dose of 50 mg of propionate every two days. The usual dose of the most experienced athletes propionate 100 mg a day or more.
Be sure to take anti-estrogen drugs, such Proviron or aromatase inhibitors as usual, from the second week to prevent the development of gynecomastia, water retention, and other effects of estrogen. After the introduction of post-therapy cycle is carried out, is the most commonly used tamoxifen. Furthermore, it is desired that the output of cortisol blockers to preserve reception weight gain. Be sure to follow the diet for a set of weights, and take sports nutrition.