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. And, buying would not mean you have to take the top of the line heart rate monitor equipped with complete features and the latest technological breakthroughs. While these would be good reasons to buy your first heart rate monitor, it might be unwise. Buying heart rate monitors would mean determining your need for a device. 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. For people who have the passion to take outdoor adventures, Polar recommends the AXN700, AXN500, AXN300, and the AXN700. Now outdoor enthusiasts will never have to manually check their heart rate with these Polar heart rate monitors. Just make sure that you can use most of the features and not allow yourself to get confused on the complicated features and procedures of the heart rate monitor. Memory: To be able to record the data of your previous training, you should need a heart rate monitor that has a good memory storage capacity. And the best mean to do that is to exercise. While exercising could be good, plain exercise without guidance from expert might have less effect. But if you do not have a fitness expert to guide you, there is one device that could replace them: heart rate monitor. Heart rate monitor is designed to be the ultimate exercise companion even if fitness trainers are available. Another good thing about the Timex heart rate monitor particularly on some specific models is the Timex Bodylink system. Other heart rate monitors use speed sensors to calculate speed and distance. But the with eh Timex Bodylink system, the distance and speed is calculated with the use of GPS satellite system.