I m 66, reasonably fit, work in a school with floor floors, am apt to climb the stairs several times a day. Last set of stairs, takes a few seconds to catch my breath, but only slightly noticeablo. Used to smoke cigars, quit 5 years ago. High cholesterol (treated) but HDL is 55. Moderately high blood pressure (treated with lisinopril). My younger brother, 62, has coronary artery disease, but he has been obese for 20 years. Start to worry?