Will COPD progress a lot if i never smoke again? I havent been diagnosed yet. No noticeable symptoms but obviously my smoking history is not good & i know you can have it with no symptoms. 43F, quit smoking 4+ mo ago. The last 10 yrs i smoked an average of 10/day. Before that 20/day for 15 yrs. Im a runner but slow. 11 min mile. i run abt 3 miles a day up to 6 mi.