For beginners of course, there are particular heart rate monitors that are not complicated and not expensive. For more advanced users, there are several selections of heart rate monitors that would answer the demands for features. The second thing you have to consider in buying heart rate monitor would be the comfort. Creating an improvement with the running routine, athletes, trainers, runners, and health conscious individuals should have the S120, S810i, S610i S410, S625X, RS 200, RS100, and RS200sd. 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. There is no need to wear the strap with transmitter. However this might not be very appealing to those who would like to have an access of their heart rate whenever they demand to. The strapless heart rate monitor might not be good for training for it interrupts the continuity. This is because to be able to have a heart rate reading, the user still has to place 2 fingers on the device for seconds. Now, heart rate monitors are backed with functions and technology. Some of it includes more complicated data recording. Top models would record the lowest and the highest heart rate as well as the average heart rate and everything in between. Other heart rate monitors can count the number of calories you are burning and the total calories burned during the duration of exercise. With the wristwatch heart rate monitor, you can now know if you are training too hard and need to slow down or if you are training too weak and you need to pick up your pace. 3. Portability. Wristwatch heart rate monitor is small and compact, thus it would eliminate the need for big space. And with its size, you can have the convenience of treating it more as an accessory than an exercise tool. Heart rate monitor is designed to be the ultimate exercise companion even if fitness trainers are available. Heart rate monitor gives virtually the same expertise with that of a fitness trainer. It makes everyday exercise a lot easier and more enjoyable through its several exciting features although its main purpose is to measure your heart rate during training.