While you busy yourself to keep on tract, these Polar heart rate monitors are busy to keep your heart monitored and track your distance and speed. People who love cycling need not to worry about the monitoring of their heart rate. Polar heart rate monitors have Polar S725X, S720i, CS200, CS200cad, CS300, CS100b, CS100. It uses only the wrist-worn device that reads the electronic signal released by the heart through the fingers pressed on the device for a given length of time. The two-part heart rate monitor on the other hand is composed of the strap and the wrist unit. The belt strap reads the heart rate measurement and acts as a transmitter. More there is a need to monitor the previous training records, Reebok heart rate monitors add memory as a feature. The memory would be able to record the minimum, average, and the maximum heart rate, the average heart rate per lap, and the time during, below, and under the target zone. With this memory capability, Reebok heart rate monitor would immensely provide you that much needed monitoring of your whole training. Strapless Heart Rate Monitor and the Conventional Heart Rate Monitor There are two major types of heart rate monitors: the one that uses a strap and the strapless. Most of the manufactured heart rate monitors today are composed of two major parts: the chest strap and the wrist unit. The chest strap acts as the transmitter to which the heart rate is measured. These two parts work hand in hand to give an accurate heart beat rating. But then most heart rate monitors use analog signal which is indeed accurate. But a more accurate technology is being capitalized by Timex to their heart rate monitor. The FM technology makes it easier to have a precise heart beat rating within 3 heart beats per minute. The style and a wrist watch image is also basic in every heart rate monitor. It may or may not tell time but most likely, heart rate monitors do have time. Other basic features include backlights, digital display, and water resistance among others. Now, heart rate monitors are backed with functions and technology.