Dude the people on this site in general are clueless about gear. Dont get me wrong, there are probably a few experienced users floating around, but the overall knowledge absolutly pales in comparison...
Studies are still conflicting in terms of whether test production is affected or not; however, Smoking marijuana will inevitably decrease lung capacity thereby negatively affecting the bodies oxygen...
Stats: 5'9 145. You just need general size. Eat and lift heavy. Various full ROM lifts like bench press or DB bench are probably more practical for chest size.