I've smoked a couple of times! Help?

Well i've smoked a couple of times. I've done a couple of cigarettes, some cigars, and I mostly do hookah. I love hookah but I really want to get in shape. I feel that I cannot get in shape after all the smoke I have done in the past. I used to do wrestling last year and I didn't do wrestling this year ecause I thought I couldn't handle it after smoking a couple of times. I used to run 20 minutes as a breeze and now I die after 10. Maybe it's because I stopped running/exercising also? Help!