LED strong help Apple Watch can measure heart rate

About Apple Watch we need to know a lot, and Apple also know this. Recently, they updated the official website of the support page, allowing users to further understand how the heart rate monitor Apple Watch work.

Apple said Apple Watch heart rate monitor called "photoplethysmography" (photoplethysmography), but this is actually a very simple technique based on, so you don't need to understand this complex noun.

Blood is red because it reflects red light and absorbs green light. Apple Watch uses a green LED light and a light sensitive diode to monitor the blood flow of any critical moment through your wrist. When your heart is beating, the blood flows through your wrist, the green light will absorb. Between every two heartbeats, the blood flow is less. LED lights flashing several hundred times per second, Apple Watch can calculate the number of heartbeats per minute - that is, your heart rate.

In addition to the green LED lights, apple can also use infrared light to track the wearer's heart rate. In fact, infrared light is Apple Watch is used to measure the wearer's heart rate, measured every 10 minutes. Only when the infrared system can not get the appropriate readings, the system will switch to the green LED lamp for monitoring.

In addition to explaining the technology, Apple has also provided advice on how to get better monitoring data for potential customers. The first is to watch your wrist, not too loose. In addition, the readings of the heart rate monitor also depend on the external temperature and the ongoing activity of the wearer.

Most of the Android Wear smart watch at the time of exercise are difficult to work properly, so the heart rate monitor Apple Watch is awesome is worth the wait.

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