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Heart rate zones are set to "Based on %HRR", but are actually calculated using %MHR. Is this a bug?

My FR255 has auto detected my Max HR at 178 and resting HR at 48bpm. I've set my heart rate zones based on %HRR. Therefore, they should be:

Zone 1 113 126
Zone 2 126 139
Zone 3 139 152
Zone 4 152 165
Zone 5 165 178

but the chart after my run says:

Zone 1 89 107
Zone 2 107 125
Zone 3 125 142
Zone 4 142 160
Zone 5 160 178

which is exactly what they would be if based on %MHR.

Is this a known bug? What do I need to do to update the zones correctly?

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0 ovekvam over 1 year ago

In my watch, I have chosen zones based on %MHR. But my zones are given as percentages, so none of the numbers are over 100. My zone 5 is 92-100 percent, and zone 4 from 87-92 percent, and so on.

+1 8980788 over 1 year ago

This used to happen to me at random times. Do you have your Sport Heart Rate Zones set? That seemed to do the trick for me, and it never switched back afterwards.

0 JoshuaKuswadi over 1 year ago in reply to ovekvam

Sorry, I wasn't clear. The numbers were heart rate assuming zones 50-60, 60-70, 70-80, 80-90, 90-100%.

So, zone 2 (60%-70%) of HRR should be 126-139bpm, but it shows up as 107-125bpm.

+1 JoshuaKuswadi over 1 year ago in reply to 8980788

Thanks @8980788 after more looking than it probably required, I found this, and realised my watch has "Running heart rate" set to %MHR not %HRR. Perfect. Thanks all.

0 8980788 over 1 year ago in reply to JoshuaKuswadi

Glad you got it sorted!