AM - 11 miles easy. Heart rate took longer than usual to pick up. Once the pacemaker kicked in I felt fine. I then slowed down my running pace, but my heart rate drifted down too much which wipes me out. I had to walk and then force the pace once I started up again to bring the rate back up enough. Some days the pacemaker just doesn't operate right without me forcing it to work. Checkup with the Cardiologist next Monday.