Why are all the continuous health measurement switches turned off on the Xiaomi Watch S4 41mm?

The ultra battery saver mode on the Xiaomi Watch S4 41mm reduces power consumption. When it is enabled, the watch will turn off continuous monitoring for blood oxygen, heart rate, and stress to extend battery life. This means that while the watch remains functional for basic tasks, it will temporarily suspend automatic health tracking to conserve energy.
If the watch continues to be used until it shuts down and is then restarted after charging, you will need to manually turn on the functions again.
Note:
1. To maintain continuous health tracking, it is recommended to limit the use of ultra battery saver mode.
2. Keep your watch updated to benefit from future software improvements.