How Apple Watch Measures Heart Rate & Its Accuracy Explained

How Apple Watch Measures Heart Rate & Its Accuracy Explained

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The Apple Watch’s accuracy level can be different from person to person, and, for some, it’s impossible to get a heart rate reading at all.

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How Apple Watch Measures Heart Rate & Its Accuracy Explained

The Apple Watch is capable of tracking many health-related aspects of your body, including heart rate. The heart rate monitor is less accurate than you might think, but there are ways to improve the accuracy of heart rate readings received from the Apple Watch.

The Apple Watch Series 5 was released in September 2019, and it remains one of the most sought after smartwatches available. Several smartwatches and fitness trackers on the market have the ability to track heart rate, but the Apple Watch remains one of the most commonly purchased products with heart rate tracking. It was cleared by the FDA for its precision. Despite that, studies have suggested that the Apple Watch’s accuracy is less than 50-percent.

The Apple Watch tracks heart rate using photoplethysmography. While this sounds complicated, it just means it uses light to track your heart rate. Red things, like blood, reflect red light and absorb green light. The Apple Watch uses green light to help detect how much light is being absorbed by the blood in the veins, and that fluctuation can be used to track heart rate. The green LED lights flash hundreds of times each second in order to get an accurate reading. This is the type of reading it takes as someone is actively working out, and it supports tracking heart rates that are 30–210 beats per minute. The heart rate sensor also uses infrared light to track heart rate in the background all the time, and to provide heart rate notifications.

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How To Increase The Accuracy Of Readings

Heart rate can also be tracked using the Digital Crown on the side of the Apple Watch. When you place the finger of your opposite hand on the crown, it creates a closed circuit between your hands that goes through your heart. Because of this closed circuit, the heart rate measurement is much more accurate, and you will also get a much faster reading than what you experience with other methods.

The Apple Watch’s accuracy level can be different from person to person. For some, it’s impossible to get a heart rate reading at all. However, there are things that can be done to help get a more accurate heart rate reading more consistently. Making sure the Apple Watch fits well is one of the best ways to ensure an accurate reading. The watch should be not too tight or too loose, and it needs to remain on the top of the wrist at all times. Wrist detection also needs to be turned on in order to have heart rate detection whatsoever. Anytime Power Saving mode is turned on, the heart rate sensor will also stop tracking the heart rate. Tattoos, skin perfusion, and the type of movement may also affect the accuracy of the Apple Watch readings.

Link Source : https://screenrant.com/apple-watch-heart-rate-measurements-accurate-explained/

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