Walking becomes easier. Lung capacity increases up to 30 Within 1-9 months: ****Cilia that sweep debris from your lungs grows back.**** Energy increases.Sinus congestion and shortness of breath decrease. Within one year: Excess risk of coronary heart disease is half that of a person who smokes.alking becomes easier. Lung capacity increases up to 30 Within 1-9 months: ****Cilia that sweep debris from your lungs grows back.**** Energy increases.