The function conforms to the general use of a heart rate monitor. It keeps you on tract with your heart rate while doing your exercise on the treadmill. It eliminates the need of checking your pulse manually which is often inaccurate and hard to do. Treadmill heart rate monitor guarantees every treadmill user that they get the right amount and intensity of training for the device would tell if you exceed your limit or you need to pick up you pace. In order for this wave to travel, the doppler fetal heart rate monitor is aided by particular liquid often a lotion, oil or water. The liquid is applied on the mother s belly that would let the sound waves to travel from the heart of the baby across the belly through the monitor. The doppler fetal heart rate monitor can be used on expectant mothers carrying as early as 10-12 weeks old fetus to the moment you are about to give birth. The Reebok strapless heart rate monitor would only give the heart rate reading whenever requested. But even if the Reebok strapless heart rate monitor uses no transmitter, basic features and special features are still present. There are still the date and time display, the stopwatch or the countdown timer, alarm, calendar, calorie counter, fat counter, backlight, and more. The second thing you have to consider in buying heart rate monitor would be the comfort. This particularly goes with the gender. It is given that most heart rate monitors are designed for men so the size of the strap would not easily fit to the women s. And if the strap would not fit properly, there is a great tendency for inaccurate reading. Polar also has different types of heart rate monitors that are suited for each type of user with different demands. For starters and for those whose demands are only to monitor their heart rate during regular exercise, Polar provides the F series. The F5, F4, F4 female, FS3, FS3c, FS2, FS2c, FS1 plus the F1, F2, and the F3. The foundation was prompted by the necessity to have a heart rate monitor that would give her the best result in maintaining her normal weight after giving birth. 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.