The main probable differences between the massively bulked up power body-builders and those guys in everyday life walking down the street are drug use and testicle size. Those with the massive muscle mass almost certainly take drugs we know as steroids which they have sourced illegally and testosterone is one of the steroid-group of hormones. Boosting testosterone naturally does not produce such excesses of the steroid such that these men can beef up to such high levels and so almost certainly it is achieved by illegal drug use. The downside of interfering with nature’s balance and grand design in this way is that their bodies no longer produce their own hormones and this leads to a shrinking of the testicles from lack of use.
The opposite effect is true for those men who wisely choose to boost their own production of testosterone naturally by diet supplements; that is, their testosterone is boosting injectable steroids for sale causes their testicles to grow in size and to be larger simply because they are busy at work producing higher volumes of their hormone needs. Of course just taking diet supplements is not enough to cause the higher production as the essential trigger for higher testosterone in the blood is the physical stresses that lead to the brain demanding a higher volume of out-put. By doing short-term bursts of muscle-burning weights training, the brain understands that the body needs more testosterone and so not only more is more androgenic hormone produced by the testicles, a higher percentage of the testosterone stored in the blood is set free from the proteins bound to it for protection and so the free testosterone can get to work to build more muscle.
This whole process of increased hormone production and higher percentages of free testosterone both lead to a positive feedback loop whereby men are naturally more active and busy with their lives, which places even higher demands on the testosterone levels and production requirements.