Does the Polar V800 heart rate monitor accurately measure RR intervals and HRV parameters at rest compared to an ECG?
The Polar V800 heart rate monitor provides valid RR interval and HRV measurements at rest that are consistent with ECG recordings.
The V800 improves over previous Polar models, with narrower LoA, stronger ICC and smaller ES for both the RR intervals and HRV parameters. The findings support the validity of the Polar V800 and its ability to produce RR interval recordings consistent with an ECG. In addition, HRV parameters derived from these recordings are also highly comparable.
Giles et al. (2015) studied this question.