Can Charge5 measure blood oxygen, heart rate variability and skin temperature all day？

[Henry12138]

It seems that Charge5 only measures blood oxygen, skin temperature and heart rate variability at night. Can the device measure these parameters all day?

[LZeeW]

@Henry12138   I'm sorry, but no.  In order to be complete, these night time measurements are consistent across all Fitbits that have these health metrics.

[JohnnyRow]

No Fitbit devices report those during the day, or on-demand.  I think the issue is that they require you to be still for an extended period of time.

[Henry12138]

Thank you for your answer. In addition, I would like to ask why it requires the personnel to be still? Is it for more accurate measurement? Or what other reason?

[Henry12138]

Thank you for your answer, but I still hope that fitbit can measure these parameters all day long, which is significant for our scientific research on human thermal comfort.

[LZeeW]

@Henry12138   This additional information is very helpful.  No Fitbit model can give you the information you want.  You will need another brand for your research.