Читать книгу Apple Watch For Dummies - Marc Saltzman - Страница 52

Beginning with Apple Watch Series 6, your wearable device is capable of detecting blood oxygen levels. When initiated by the user by tapping the Apple Watch app, green, red, and infrared LEDs shine light into your wrist, and photodiodes measure the amount of light reflected back. Advanced algorithms then calculate the color of your blood, which indicates the amount of oxygen present. Wow. Blood oxygen levels between 95 and 100 percent are considered healthy — a lower percentage could indicate compromised heart, lungs, or brain functionality — but be sure to consult with your doctor. In fact, Apple stresses the Blood Oxygen app is not intended for medical use, but rather, designed for general fitness and wellness purposes.