Title: Garmin Fenix 5X Plus review
Headings: Garmin Fenix 5X Plus review
Garmin Fenix 5X Plus review
Garmin Fenix 5X Plus: Design
Garmin Fenix 5X Plus: Sports tracking and mapping features
What is pulse ox acclimation?
Garmin Fenix 5X Plus: Smartwatch features
Garmin Fenix 5X Plus: Battery life
Garmin Fenix 5X Plus

Content: This is what the new red light on the back of the 5X Plus is checking for. Your saturation will be displayed as a percentage; the higher the number shown on the screen, the better. Most people need this saturation level to be at least 89% to stay healthy, and at sea level the human body operates to its best potential. But at higher altitudes the amount of oxygen in the air decreases, which can have an effect on someone's SpO2. The pulse ox acclimation feature is a way to see how your body is adjusting to higher altitudes by monitoring your blood oxygen levels. We haven't been able to scale any great mountains with the 5X Plus yet, but we did take it out hiking on some hills to see what would happen. The Pulse oximeter displays as one of the widgets from the home screen, which can be scrolled to using the buttons on the left hand side. It can be set to take readings automatically or manually but – and here's the thing – it requires you to be incredibly still in order to get a read. This is because any slight movements can interfere with the sensor.