Count ?: When you first arise it is likely your lungs are less fully inflated. When you sleep you may not fully expand your lungs since your body can function with less work of breathing. That sait, it may just be your device warming up. I would not be disturbed by the readings cited. Why you do this is not clear from your post.
Answered 1/2/2021
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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