watchOS 11 adds sleep apnea detection for Series 9 and Ultra 2.

Rest Days Without Streaks:-Users can take rest days without breaking activity streaks.

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Detecting Sleep Apnea :-FDA authorized use of accelerometer data to identify sleep apnoea.

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Training Load :- A workout's intensity and duration in the last week are compared against the previous month.

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Pause Activity Rings :- They allow breaks due to injury or illness without ending your activity streaks.

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Customizable Fitness Summary :- This summary tab can be modified to prioritize health metrics in the fitness application.

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Vitals App :- It gives an overview on heart rate, breathing rate, temperature, oxygen levels and sleeping data.

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Cycle Tracking :- It displays gestational age and tracks symptoms experienced during pregnancy.

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Double Tap Gesture :- You can use it to scroll through apps like iMessages or Calendar by double tapping them.

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