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Thanks for joining the Community @DebbieYampi.
That sounds definitely frustrating! Have you changed the way in which you wear your Fitbit at all? Are you wearing it loosely or tightly? I'd say that it is a good idea to try and wear it tightly on your wrist as to improve the reading.
Additionally, was there any considerable stop during the activity that could cause the Fitbit to stop tracking the activity? Or has the intensity of the zumba sessions been reduced?
If you have any further questions, please let me know.
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