Firstly we need to look at some reasons why you would want to inject steroids into multiple sites. The main motivation is that for some reason people believe it affects the local injection site in some way. This could mean that people think it will enlarge the muscle you inject into or create hardness in the muscle.
According to the medical profession there is no evidence of this. Although it is obvious that over time and with multiple injections the site will create scar tissue that could give the illusion of a harder muscle. The main function of the muscle when it comes to injection intra muscular preparation is to act as a vessel for absorption. The fluid injected does not disperse throughout the muscle but is absorbed into the bloodstream. From here it is circulated and is deposited to the androgen receptor site throughout the body.

The effective absorption of the preparation into the bloodstream is the main goal. Smaller muscle groups are more prone to scaring and can create a lumpy lopsided look on the muscle. The formation of scar tissue may seem like it give a harder appearance but it also means reduced absorption potential. Scar tissue reduces circulation and therefore absorption. This is the main reason why intra muscular preparations do not work very well in the shoulders. Besides the fact that multiple injections into small muscles can be very painful, it does not seem to serve any practical purpose.If there was truth in the matter then many a bodybuilders would have gigantic gluteus muscle when compared with the rest of their bodies and this is simply not the case.

According to one doctor, the practice of injecting into the shoulders should be limited to inoculations and even then it is for practical reasons, (you can imagine the implications of having 2000 kids undress and bend over for a shot in the bum). Any other injection should be into the Quads or Gluteus muscles.

The main muscle groups used for intra muscular injections are the upper quads and the gluteus muscles (Also see the article “injecting steroids”). The upper and outer part of the leg, in combination with the gluteus muscles provides for a very effective rotational injection regimen that will reduce the scaring caused by high frequency injection cycles like the typical veterinarian 50mg/ml preparations. The cycle should work as follows: the first injection should go into the upped leg, the next one goes into the gluteus on the same side, following this, the opposite gluteus and final the opposite quad.

This regimen will leave a good deal of absorption time per site even if you are injecting every day, it will give the muscle four days to recover.

The bottom line is that there is no reason for injection into any muscles except the gluteus and upper quads. It raises one more point that is worth discussing. Inflammation that is cased locally may temporarily increase muscle diameter, especially in small muscle groups. The main thing you need to understand here is that it may seem desirable, but continuous and multiple inflammation in a muscle will cause permanent muscle damage, both in function and strength and ultimately leads to noticeable muscle atrophy, the exact opposite of what you are trying to achieve by taking steroids in the first place. Things like Synthol therefore will ultimately cause more harm than good because it relies on inflation to create the muscle expansion.


is this true about the delts or bollocks as i was going to try them tonight but if it doesnt work as well then ill just stick with glutes and thighs!