Large display would enable you to read easily in arm s length your heart rate without the need of stopping for few seconds. Along with the display, the right heart rate monitor should have big buttons. This would give you the ease of pushing your heart rate monitor with your finger while you are moving. Cardiosport heart rate monitor assures user to have a great exercise without worrying about the comfort of the chest strap. Each Cardiosport heart rate monitor model is designed to be the perfect exercise companion of ever trainer, athlete, and fitness conscious individuals. And with the use of this device, it is much easier to track progress each time the user rides a bike, run at the treadmill, lift some weights, or simply walk around the block. Since knowing the status of the heart is very important in telling the effectiveness of the workout, monitoring the heart rate would be very important. This makes the checking of the wrist or the neck after the runner would stop his/her workout logical. This manual reading would be able to tell the heart rate of the runner. With treadmills, we would not require ourselves to wear training clothes suitable for the summer days. We will never have any reason not to run during winter days. And we will never be able to miss one day of training if rain begins to fall outside our windows. With treadmill, add we have to do is to step on it and off we go; no weather considerations, no outfit to match the cold, and no dogs to chase us while we run. All mentioned Polar heart rate monitors are suited for fitness conscious individuals who want to be guided during their daily workout and exercise. 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. 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. The data is then transferred to the data to the wrist unit. The wrist unit on the other hand receives any data the transmitter sends.