Frequently Asked Questions 1. An electrocardiogram, or ECG, is a measure of the electrical activity of the heart.
Heart rate can be a useful tool in individualizing and optimizing exercise regimens.
Those wanting to increase endurance or performance may want to aim for certain target heart rates to maximize progression towards their goals. Conversely, those with a history of heart disease may wish to avoid exceeding a certain heart rate to reduce unnecessary strain on the heart. Before any fitness program, it is recommended that the person should have a complete physical examination. Consult your physician for an appropriate heart rate target zone limits for your fitness level. I have been using a Polar heart monitor.