Which device is most suitable for measuring heart rate variability in the field? A comparative evaluation of two leading options

Abstract

Objective: The aim of the study was to compare the Polar H10 and Bittium Faros™ heart rate variability monitors for use in occupational and environmental health research, considering data collection, storage, transfer, resource needs, and limitations. Methods: A literature review, device testing, and expert interviews were conducted to assess device performance and usability. Results: Polar H10 is affordable, records RR intervals for up to 20 hours offline, and requires a smartwatch and app for extended storage. Bittium Faros™ is a certified electrocardiogram monitor that records full waveforms, supports long measurements, and enables automatic data transfer. Both devices can be worn with a chest strap, but placement issues may affect data quality. Patch electrodes improve stability but may cause skin irritation. Conclusions: This assessment highlights key device differences to guide HRV monitor selection for occupational and environmental epidemiological studies.