Читать книгу Apple Watch For Dummies - Marc Saltzman - Страница 53

Beginning with Apple Watch Series 6, your wearable device is capable of detecting blood-oxygen levels. When you tap the Apple Watch app, green, red, and infrared LEDs shine light into your wrist, and photodiodes measure the amount of light reflected back. Then advanced algorithms calculate the color of your blood, indicating the amount of oxygen present. Wow. Blood-oxygen levels between 95 and 100 percent are considered to be healthy — a lower percentage could indicate compromised heart, lung, or brain functionality — but be sure to consult your doctor. In fact, Apple stresses that the Blood Oxygen app is not intended for medical use; it’s designed for general fitness and wellness purposes.