Heart Rate Monitors
A heart rate monitor is a device that usually consists of two elements, a chest strap and a wrist receiver (which usually doubles as a watch). It allows a user to monitor their heart rate whilst exercising. Strapless heart rate monitors are available as well. These heart rate monitors do not require a chest strap, but they do lack some of the functionality of the strap variety. Advanced models additionally measure heart rate variability to assess a exerciser's fitness level.
Heart Rate Monitor Information