Most of us know about Fitbits or something of similar ilk which can track your sleep and the amount of steps you take each day, but there is another device on the market supposedly intended to track your heart.
A new study in the Annals of Internal Medicine suggests the over the counter, so to speak, heart monitoring devices, are a waste of your money. Researchers tested four different trackers and then compared them to the results of an electrocardiograph or ECG which is considered the most accurate measurement of heart rate. The researchers followed 40 healthy adults aged 30 to 65 and found the most accurate tracker that they tested was within five beats per minute of the ECG while the least accurate was off by 23 beats per minute. However, ALL of the trackers were inaccurate during exercise; anywhere from 23 to 41 beats per minute.