Originally Posted by KevinB

I felt like my heart was going to come out of my chest and could not catch my breath even after slowing down. After the ten miles my heart rate did start to drop but I had to stop so I could vomit. After that I did get my breath back and my heart rate got back into a normal resting range fairly quickly but i was very shaky and dizzy. It was bad enough that I called my wife from the bike and told her that I needed to go to the hospital.