Now outdoor enthusiasts will never have to manually check their heart rate with these Polar heart rate monitors. For people who want to mange their weight with the use of Polar heart rate monitor, there are specific models designed for them. These are the WM42, WM41, WM21, and the Polar WM22. And if people who is not very adventurous but want to stay health, Polar has, the M31, M32 M61, M62, A5, A3, F5, F3, F2, and the F1. And since they are usually worn on the wrist, heart rate monitors also acts as a sports watch. Some have backlights while some have none. Most are water resistant and shock resistant. These basic features might appear on every heart rate monitors on the market so you will not have any problem in these areas. And if the strap would not fit properly, there is a great tendency for inaccurate reading. The next thing to consider is the display. 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. Some heart rate monitor can also download and upload data to and from the computer for much better heart rate monitoring and other important information you need to know about your exercise. Heart rate monitor keeps every second of exercise count with its ability to measure the highest peak wherein the body could have the most efficient workout. Among all the things, you should be mindful that what you need for a belt chest heart monitor is its long service. Hence, select one that will last for several years. A normal best chest heart rate monitor could have battery that could serve for several years and require to be charged. The main problem here is that most manufacturers require you to send back the belt chest to recharge the battery. She realized that the best way to have her weight back was to be conscious about the food she eats and the level of exercise she would take. Actually, Liz realized this after she gave birth to her third child. While she aimed to achieve this, the market had yet to have the suitable product that would answer this.