Hey, I had four bypasses in Oct of 2008 and was back on the bike within 10 weeks - I'll be 70 in January. I continued to ride the road 15 to 20 miles per day until I was hit by a car last December. I've been off the bike by choice, but am going to get a mountain bike and ride on our farm instead of the roads. I am asymptomatic and will have a two year followup with a PET scan in the coming months. Continued good health; there is life after bypasses, but stay vigilant!
Bill