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By maintaining a certain intensity of daily activities or workouts, you can obtain a PAI value.
According to the results of the HUNT Fitness Study*, maintaining a PAI above 100 helps
reduce the risk of cardiovascular death and increase life expectancy. For more information,
open the Zepp app and go to PAI > PAI Q&A.
* The HUNT Fitness Study is a sub-project of the HUNT study, led by Professor Ulrik
Wisloff at the School of Medicine, Norwegian University of Science and Technology. It has
lasted over 35 years and involved more than 230,000 participants.
Heart Rate
Heart rate is an important indicator of physical condition. Highly-frequent heart rate
measurement helps capture more heart rate changes and provide a reference for a healthy
lifestyle. To ensure measurement accuracy, you need to wear the watch correctly according to
the tips, and ensure that the part next to your skin is clean and free of sunscreen smear.
Wake up the watch, press the upper button on the watch face page to go to the app list, and
swipe up or down on the screen to select and open the Heart Rate app. In the Heart Rate app
on the watch, you can view your most recently measured heart rate value, all-day heart rate
curve, resting heart rate, heart rate interval distribution and other information. Synchronize
the data to the app to view more information. You can set the Heart Rate app as a shortcut
card to start heart rate measurement more conveniently.
While the phone and watch are connected, the following heart rate settings can also be
accessed in the Zepp app under Profile > Amazfit T-Rex 2 > Health Monitoring.
Manual heart rate measurement
Wake up the watch, go to the app list, swipe up or down on the screen to select and open the
Heart Rate app, and tap to measure heart rate manually.
Auto Heart Rate Monitoring
1. Open the Heart Rate app, swipe up to the last page, and go to Settings > Auto Heart Rate
Monitor to adjust the monitoring frequency. The watch automatically measures your heart rate
at the set frequency and records changes in heart rate throughout the day.
2. Heart rate changes are more intense when you are working out. Enable the activity
detection feature to allow the watch to automatically increase measuring frequency when it
detects an activity so that more heart rate changes can be recorded.
Heart Rate Alert
In a resting state (except sleep), the device will notify you if your heart rate goes above or
below the limit for 10 minutes.
1. When the Auto Heart Rate Monitor frequency is set to 1 minute, the heart rate alert feature
can be enabled.
2. In the settings for high and low heart rate alerts, the alert value can be adjusted or alerts can
be disabled.
Blood Oxygen
Blood oxygen is an important physiological indicator of respiration and circulation.
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