I ride my bike to work quite often, and don't usually go on any long rides over 20 miles. In July, while on vacation, I went for a walk early one morning. I hadn't gone far and just about fainted. Caught myself on a parked car. Didn't really think much about since i was on a trip and didn't have another spell for about 3 week. I quit riding my bike for fear of having on of these spells. I had a fourth one about September 25th and decided it was time to go to my doctor. He did an EKG and sent me to the cardiologist who sent me to Memphis for a pacemaker. I never felt bad before the pacemaker except when having one of those fainting spells and they only lasted a few seconds. Doctor said my heart rate was too low and irregular. I haven't had any spells since I got the pacemaker but I still haven't started back riding my bike regular. Hope to start back when the weather gets a little warmer.