For many users, Apple Watch is a wrist-worn watch, but the latest research shows that wearing Apple Watch on the arm will not affect the accuracy of its heart rate monitor.
Heart rate monitors can still provide accurate data when users wear an Apple Watch on their arm, according to a new observational study published in PubMed.
Image source: TwelveSouth Action Sleeve
Apple Watch uses an optical heart rate sensor to measure your vital signs. It relies on a technology called photoplethysmography (PPG), which uses LEDs to illuminate human skin and then uses photodiodes to measure changes in reflected light intensity caused by blood flow.
When your heart beats, the amount of blood flowing through a specific body part, such as your wrist, increases. Between heartbeats, less blood moves. By flashing a green light hundreds of times per second, Apple Watch can calculate your heart rate. .
In the study, a surgeon wore two identical Apple Watch models, one on the wrist and one on the arm.
Statistical analysis found no systematic errors between wrist-worn Apple Watch and arm-worn Apple Watch when it comes to heart rate monitoring. In other words, the two heart rates are close enough that either measurement is considered accurate.
The study writes:
The results of this study suggest that the upper arm is a viable alternative site for using an Apple Watch to monitor heart rate during surgery.
Agreement and reliability between measurements obtained from upper arm-worn and wrist-worn devices were good, with no systematic errors and high accuracy.THIS IS A SPONSOR PROMOTION: >>>>>>>>>>>>>
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