Out of curiosity, how much do you think it would take to affect your lungs to the point where it would affect your athletic performance? Im really into sports (football especially) and im trying to get a scholarship, maybe even be in the NFL someday... But thats besides the point, I LOVE marijuana, all of my friends do it, I party every weekend and theres always marijuana at parties and also I sell it and cant help but smoke some of it.. [MOD NOTE: Discussion of selling drugs is not allowed here, even a comment in passing such as this.] so yeah.. I dont want to ruin my chances of playing football just because I want to have fun while im a kid smoking marijuana, will it mess me up that bad eventually? I smoke it like 3 times a week, maybe more, probobly about 7 grams a week(sometimes its alot more, 7 being minimum)?