I had my heart attack on April 20, 2013 and got back on my bike June 9th. I also led a cave trip (my other passion) on June 20th.
I went to cardiac rehab for 18 sessions (3 x week). All through the rehab, they told me over and over to "listen to your body" and do what you feel comfortable doing. So that's what I did...if I felt comfortable and able to do something, I did. People kept telling me that I should take it easy, but I refused.
I felt myself get stronger day by day, and now, 16 months later, I feel better than ever. My cardiologist is happier than a pig in you know what.