Inaccurate heart monitor

[Illyjayvee]

Hello, I've had my blaze for quite a while now, and I find the heart rate monitor to be dodgy, especially when displaying a graph after a workout. Most of the time, when I check the app to see my current heart rate, the readout is correct, and sometimes it's even right about what my heart does/did during a workout.
When it's wrong, it reports a heart rate significantly lower than my actual one-- for example, when my heart rate should be going up, like during an interval or an increase in workload, the Fitbit readout doesn't reflect that with a rise in the heart rate graph. For a while, I considered the possibility that my heart was acting funny, but then, on a stationary bike, I paid attention to the readout on the bike itself-- it showed that my heart rate increased with workload-- but the Fitbit readout showed a consistently low heart rate.
For what it's worth, the further I am into a workout, the more accurate the Fitbit seems to be. My only guess is that, by that time, my heart is pounding, which makes it easier for the device to read it.
I wear the Fitbit on my left wrist, 2-3 inches up from my hand. It's not on too tightly or too loosely.
Any suggestions?

[SunsetRunner]

Try restarting your Blaze with the steps below.

[bbarrera]

@Illyjayvee if a restart or playing with fit doesn't fix the problem then rest assured, other people have seen the same problem and its a known issue. I like to say Fitbit is good for the 23 hours a day when I'm not working out! (Fitbit seems fine at resting heart rate, but accuracy during exercise is only ok if I settle for 'averages')

[AngelaMa]

Hello @Illyjayvee welcome to the Fitbit Community! 🙂  Your heart rate may be affected by any a number of factors at any given moment. Movement, temperature, humidity, stress level, physical body position, caffeine intake, and medication use are just a few things that can affect your heart rate. You can find some tips on how to improve the accuracy of your heart rate readings on this article.  

@SunsetRunner and @bbarrera thanks for stopping by! 🙂 

Let me know if this helps! 🙂