Based on the American Lung Association's smoking cessation program, here is expert advice on how to. The average person gains between five and ten pounds after quitting smoking, and there are at least four good reasons why. It worked for me and I know it will work for you too! Jun 9. But kicking butts often goes hand in hand with weight gain. If you're a smoker, the healthiest resolution you can make is to kick the habit. How to keep off the pounds when you give up cigarettes. How to Quit Smoking Without Gaining Weight. A team of scientists has discovered exactly how nicotine suppresses.