It’s been happening frequently but today I paid attention. I did a very intense cardio workout and the Fitbit was recording heart rates that were accurate, up to 150 and 140 readings…and telling me I was exercising strenuously. Then I synced it and it said my heart rate never went above 90. Avg heart rate 84. 100% in light zone…nothing in any other zone. I probably spent 20 minutes at least in the strenuous zone. It’s been like this for awhile. Very frustrating. It did say I burned 356 calories which is probably accurate but still…where’s the heart rate data? It’s been downhill since Google bought Fitbit
