The types of EKG include: Standard (resting) EKG involves measuring your heart’s electrical activity as you relax in a reclining or semi-reclining position. This is the most common type of EKG. Stress test (exercise EKG or treadmill test) involves performing an EKG while you exercise, usually on a treadmill.olter monitor (24-hour EKG or ambulatory EKG) involves wearing an electronic EKG recorder for 24 hours. It records the electrical activity of your heart over 24 hours. It helps diagnose arrhythmias (irregular or abnormal heartbeats).