steroid cycle and development

Hi, I’m a college(europe university) level athlete(can’t disclose where) and my coach wants me to run a cycle(500gtestcypionate, with some mass, wet oral and obviously all the estrogen control and shooting these injections at the end of the cycle to help testicles work in the transnational period of coming off). I’m only 21 and I’m afraid it could stunt my hormonal etc. development and I dont plan to do sports for a living so I’m ok with refusing this. Is some kind of irreversible hormonal damage etc. possible at this age from a steroid cycle?
Thank you.

The hormonal changes and their “reversibility” is a rather complex subject, discussed here:

https://www.fertstert.org/article/S0015-0282(14)00187-3/fulltext

With that said, we would recommend against pursuing this.