cost of heart monitor
1 There are various types of heart rate monitors. 2  The most common type features a strap, worn around the chest, and a watch, which displays the heart rate. 3  This type of monitor costs between $30 and $470. Heart rate monitors and the included watches need batteries to operate. 2  The batteries required will vary depending upon the brand of the device. 3  Batteries typically cost less than $10. 4  Expert opinions vary on how to best optimize training using a heart rate monitor.