With the heart rate monitor, the intensity of training is regulated to get the best exercise or training possible with the least amount of effort. If there is over-training, there should be under-training. Like the former, the latter usually happens, as the right amount of intensity can never be accurately monitored. You have to take into account the when you are training, either you are running, swimming, biking or on a treadmill, you are making great body movements. And when you do such activities, there is a need for a large display. Large display would enable you to read easily in arm s length your heart rate without the need of stopping for few seconds. 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. Some heart rate monitor can design a specific workout program for the user. And with its size, you can have the convenience of treating it more as an accessory than an exercise tool. 4. Mobility. A wristwatch heart rate monitor would only have to be worn on the wrist without interfering with the exercise. It is light, compact, and stylish which would make it more wearable. Wearing a wristwatch heart rate monitor would still give you the freedom to move in ways you want to. This depends on the fabric used. Choose one with soft fabric. This is more comfortable than any other material used on a belt chest. Since training involves a lot of movement, durability should also be considered. Among all the things, you should be mindful that what you need for a belt chest heart monitor is its long service. Discount Heart Rate Monitor The basic normal heart rate monitor with basic features would often cost around $50-$100 while higher models with several upgraded features and killer design would range between $100-$350. This is okay if you are earning so much or if you only need one heart rate monitor. But if you require to have several units or if you are not so blessed with much resources, at this price, you might not get the right model and right quantity you wanted.