I give you credit, for becoming active after a quad bypass. I have a friend, and former high school classmate, who had a quad two years ago,he tore the staples and glue holding his chest together, he was adviced against heavy lifting after surgery, but didn't listen to his doctor. He had his chest repaired, a second time last Oct, 2008, at age 65. He is affraid to move now, and just sits and watches t.v. and eats,I wish I could get him to do some light excercises, but he lives in Las Vegas, NV, and i'm in MN. I have been E mailing him, trying to get him to do some biking, or get out and do some walking. I wish you well, it sounds like you are going about this in the right way,I hope you have a long and healthy life.