Heart Rate Zone Graph

[dstew7003]

why did the heart rate zone change so dramatically starting around Sept 1st, there were no changes in my lifestyle, daily routine or my exercise schedule but you can see how graph changes. I've included a screenshot.

[Gondwana]

This isn't really an SDK question, but the answer could be that Fitbit has changed the calculations about how zones are calculated. My cardio zone is now 20 bpm higher than it used to be! 😰

[dstew7003]

What is SDK, and why would the Fitbit make such a sudden and dramatic
changes to the Heart Rate Zone?

--
Don

[Gondwana]

SDK is 'Software Development Kit', which is the section of the forum in which you posted. You might get more responses if you posted in a more appropriate section.

There's some info about the new zones here.

[adriec]

You're in a developers forum, if you go to the main Fitbit community you can find other areas for more users. 

This is the forum primarily aimed at developers designing apps for the Fitbit community.