Dude if you know anything at all about chemistry and biology that thing in the mirror will appear to you as it does to me, fucking unhealthy as fuck. It ought to die for lack of food and water, yet it lives to pose another day before being rescued by emergency calories. It's sickening. That level of huge is only achieved with one thing, peptides, namely insulin. Let me scratch you situation.
Steroids came about in the early 20th century as adaptations of synthetic hormones that boosted red blood cell activity and made muscle growth more easy, they were prescribed to chemo patients and other sickly people. Abuse followed soon but it was not widespread, and the effects weren't huge yet. Until the 1980s the most you would likely see was a guy gain 30-40 pounds over his natural maximum as dictated by his frame and muscle structure (muscle is like eggs for a woman, your born with the cells in a fixed amount. Training is used to make the cells bigger).
Next down the pipe was the first big peptide, human growth hormone, which causes cell division, like bone growth, and actual real new muscle cell creation. Synthesizing it allowed more gains and keeping them longer (all gains eventually go back without redosing). But hgh also causes cell division across the board. This means all organs increase in volume, pushing the "gut" out over time (check the strongman pics). And cancer, it means cancer.
Lastly in the 1990s came insulin, in the former of insulin growth factor, or IGF-1. It, theoretically, allows near-limitless expansion of muscle tissue. This is a complex chemical chain but basically insulin is deeply involved in how much a body gains or loses weight, and can be manipulated to affect muscle tissue. Combined with the first two chemicals, it allows taller athletes to achieve weights approaching and going over 400 pounds regularly.
It also causes diabetic like symptoms, including blood sugar drops that hit suddenly and can go so low they result in diabetic coma and death. Even a perfectly planned regimen of training, drugs and food can go wrong with insulin, in a matter of seconds. I don't know how many guys have died of this already. It's literally insane.
In the end yes you will gain muscle, and power will go up. All top big-weight guys are on it, especially powerlifters, strongmen, and bodybuilders/actors. Bane is literally a normal dude crazed out of his mind on insulin (it has huge mood implications) staring you in the face.
This could have its uses, say for working security or bodyguard. But diminishing returns hit fast, and the more you have to move, the quicker that point comes, until you see SF, who might avoid all weight gain possible (interestingly steroids are still real popular for the red blood cell production which jacks up endurance, but then you have to avoid weight training or you will get too muscular). But the most important martial skill over all is
still covering ground on foot.
All this is confirmable with quick googling. Good luck and maybe I'll do more write ups later, I'm always glad to see pol interested in ground-up stuff like /g, /ck, /fa, /fit, /k.
Dammit kikewheels I worked on this post let me have it