Changes

== Bands and Watches ==

== Bands and Watches ==

Most smartwatches and fitness trackers that are worn as wrist-bands provide heart rate data in one form or another. Virtually all of them do so through Pulse Oximetry and try to avoid measurement artifacts through the use of accelerometer data. Widely used wearable devices that include heart rate data are:  

Most smartwatches and fitness trackers that are worn as wrist-bands provide heart rate data in one form or another. Virtually all of them do so through Pulse Oximetry and try to avoid measurement artifacts through the use of accelerometer data. Cheap devices might actually not be able to reliably read heart rate from the pulse oximetry and rather "make up" heart rate "readings" solely based on the amount of movement as measured by the accelerometer. Widely used wearable devices that include heart rate data are:  

* [[Fitbit]]'s have many studies using them and [[Quantified Scientist]] says that they are one of the most accurate ones. Fitbit devices typically record continuously while worn.  

* [[Fitbit]]'s have many studies using them and [[Quantified Scientist]] says that they are one of the most accurate ones. Fitbit devices typically record continuously while worn.