HR Accuracy of Vivosmart 4

(sorry for my broken English as it is not my mother tongue)


I bought the Vivosmart 4 yesterday and updated S/W 2.60.

Tested its HR accuracy of Vivosmart 4 by comparing with the combination of Garmin 935+Scosche Rhythm 24. Workout; 45 mins indoor cycling.

In the attached pictures show the HR reading from Scosche (picture on the left) was quite a reasonable while the Vivosmart 4 (picture on the right) shown quite a low HR (below 80 bmp) at the beginning, then rose up to a more a more reasonable reading from the final 10 mins of the workout!!

Is it something wrong with my Vivo4 or does it need a few days to warm up?

Thanks a lot. ciq.forums.garmin.com/.../1425540.jpg ciq.forums.garmin.com/.../1425541.jpg
Parents
  • I'm giivng up on wrist-based optical HR. Getting a chest strap -- and I hate chest straps!

    It seems pretty okay for sleep and sitting around, but when exercising it's hopeless. I have Vivosmart 4 and Vivoactive HR, and both read 50-80% of chest strap (or manual count) when exercising. They go further off when it's cold. I get a huge drop when I pull off my arm warmers in winter. Even sitting on the trainer it doesn't work. Strangely, they worked better for the first few weeks of ownership. I can't explain. Variables shmariables. I'm getting a chest strap.

Reply
  • I'm giivng up on wrist-based optical HR. Getting a chest strap -- and I hate chest straps!

    It seems pretty okay for sleep and sitting around, but when exercising it's hopeless. I have Vivosmart 4 and Vivoactive HR, and both read 50-80% of chest strap (or manual count) when exercising. They go further off when it's cold. I get a huge drop when I pull off my arm warmers in winter. Even sitting on the trainer it doesn't work. Strangely, they worked better for the first few weeks of ownership. I can't explain. Variables shmariables. I'm getting a chest strap.

Children
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