Yea I would definitely go to a gym if I took it. And wouldn't the PCT prevent problems with HPTA and the other unwanted side effects ? The main reasons I want to take it is first it's pretty cheap, my triceps just don't seem to have gotten any bigger compared to my chest, and I use to skip leg day lol.
The problem with your HPTA (hypothalamic pituitary testicular axis) returning to normal at your age, is it may not know what normal is, it may not have reached a point where your pre-set point levels have been determined (that point, if there is one is closer to 21, than 18 )... You may end up producing less natural testosterone for the rest of your life...
What happens when you inject exogenous (external) hormones (testosterones) into your body, levels of exogenous hormones (testosterone) rise in the blood, the brain detects this, and lowers natural production of things like GnRH, LH and FSH, the end result is you produce less, or no testosterone after a while..
You've basically shut down your HPTA.... Whether it re-starts again, or reaches levels where it is fully functioning, in an 18 yr old is undetermined (we don't know)..!!
The idea behind PCT is to knock out estrogenic signalling with drugs such as Aromasin/Arimidex, Clomid, Nolvadex.. When the brain detects low levels of estrogen it kickstarts GnRH, LH, and FSH, this should send signals to the leydig cells to produce testosterone...
Because testosterone is used by the body to produce estrogen (via the aromatase enzyme), the body uses estrogen levels to determine if there is enough testosterone being produced.. Thats why we knock out estrogenic signalling to boost testosterone..
Unfortunately it has been hypothesised if PCT is not followed correctly with the right drugs for the appropriate period of time, (and time off) the HPTA may end up suppressed and producing less and less testosterone after each cycle and PCT....
As a side note:
try locking out your arms at the end of each tricep movement.. C/G bench press, dips, overhead tricep presses, tricep cable pushdowns..
Your legs are by far the largest muscle in your body, you must train your legs,
you must squat (all the way down too, almost sitting on your calves)
You should be including compound exercises into your routine before anything else: Squats, deadlifts, standing presses, B/O rows, dips, chins.. (you will see there are no bicep curls or bench press every day of the week)... lol
Out of interest what AAS is your mate taking and what compounds has he acquired for his PCT..?