HR is not allowing me to get into the peak zone

[cyrusgrimes]

I was really looking forward to moving to the Fitbit Sense, I had been using a Fossil gen 3 for some time, and it was spotty, and I expected the Sense to be better - not worse! 

I do circuit training, with several short bursts of intense exercise and resistance training. It often includes interval rowing, with 30-sec bursts of all-out sprinting. To the Sense, it is like I'm doing some lite walking. Nothing is more frustrating than barely catching my breath, watching the HR jumping between 150 and 110 BPM!

I know that several people are already complaining, but the lack of response from Fitbit requires more voices to join the chorus!

HR monitoring is the most important feature for me. I was foolish enough to by the hype that PurePulse 2.0 would track my hr in my high intencity workouts.

[Tkeller3]

Same here! My Versa and Versa 2 had no problem with tracking HR and matched up more closely with a chest strap and arm strap. The sense is often 20-30 beats behind. 

[Chronoswiss]

I row 10K on my rowing machine and before the Sense I had an Charge 2  that always gave me my heart-rate  between 150 and 165 wat is almost correct with my chest strap but now there is always a difference of 25 to 35 between the chest band and the Sense. The same problem with my running. 

[WyoSundancer]

I initially was getting fairly accurate HR readings on my Sense.  After the metrics starting showing results the HR function also started showing really low HR during cardio exercise.  As low as 78 bpm.  I am doing a return and going back to the Charge 3, which I know reports fairly accurately.