> I was getting winded way before anyone else, even though I was just as active. I've always felt like I have some kind of oxygen weakness, compared to other pe

> I was getting winded way before anyone else, even though I was just as active. I've always felt like I have some kind of oxygen weakness, compared to other people. This should go without saying, but you should really get that seriously checked out before trying doping. You might have a heart problem that isn't a problem until it is the last problem you'll ever have, or it might be nothing.