I just notice a diff when I do cardio, or anything like that. It's not that I can't breathe, but like where running a mile was easy, I feel like I am running while congested or something. Just harder to breathe I suppose.
Tren causes your oxygen airways to clense up a little, hence why you cant breathe. I am running a cycle of tren right now and i have short of breath for everything, its worse when i do cardio but i deal with it and i look good. I'm gonna throw in some Clen in as well and see exactly how bad my breathing is for the meantime. Just go through with it!