ATLANTA (AP/WAOK) – A new study finds people who quit smoking have a lower chance of having heart-related problems, even if they are overweight. The study published in the “Journal of The American Medical Association” finds that while obesity remains a risk factor for coronary heart disease, smokers who quit have a lower chance of suffering a heart attack or stroke, even if they put on a few pounds in the process. Researchers say while the long-term heart benefits of quitting smoking are well documented, it had been unclear how much weight gain would fit into the equation.