Hey guys i just received my Scuba diving certification...

My question is if any gear will affect my ability to scuba dive? The increasing in Red blood cells, and mean arterial pressure wont have any effect on the nitrogen content in the blood when surfacing will it? I know Tren tends to have an affect on peoples cardio vascular systems due to the inability to absorb oxygen as well in the lungs, so therefore im staying clear of tren obviously.

Im thinking ill be fine..but does anyone have any other input or experience of Scuba diving while on gear???