For several years Garmin has had heart rate monitor in the form of green light under the bells. In addition, the Garmin Fenix ​​5x Plus has been equipped with a red light - pulse oximeter that measures oxygen saturation in the blood.

Pulse oximeter is often used by people who move at high altitudes and should be acclimatized. However, measurement of oxygen saturation in the blood is also used by athletes to avoid overloading. In combination with data about sleep rhythm, stress And more, oxygen saturation is a parameter to maintain the balance between exercise load and recovery time.

Pulse Oximeter

Traditional pulse oximeter

When we breathe, the oxygen is attached to a protein in red blood cells called hemoglobin, and is transported with the blood into the body. The infrared light on a pulse oximeter is absorbed differently on blood cells with and without oxygen. This makes it possible to measure the amount of oxygen bound to hemoglobin in the blood. This is called oxygen saturation and is usually between 94 and 100 percent.

Pulse oximeter and recovery

By using oxygen saturation along with your regular exercise statistics, you can reveal whether your body is overworked.

The day after a hard workout I can feel obvious and ready for a new session. However, oxygen saturation in the blood is less than 95% and I'm also poor sleep I should focus on letting the body rest.

If you have a low oxygen saturation in your bloodstream over time, your doctor's office should be the next stop.