I have had quintuple by-pass surgery going on 15 years ago now. 4 years after that surgery I had a stint put into one of my veins. I am pretty healthy I keep very active by walking alot. I have no car so I am forced to do alot of walking. I also work in fast food(subway) standing on my feet 4 to 6 hrs a day 5 days a week. I also clean an office once a week. I would say that the office is at least 2000 sq. ft. I am actually 5lbs over my high school weight which was over 30 years ago. I am a smoker. I smoke 6 to 10 cigs a day, Yes I know I shouldn't be smoking. I'm trying