At this time most available wrist band monitors, watches, and finger sensors that use Pulse Oximetry, LED, or light-based sensors to detect heart rate do not accurately measure (or do not support) R-R intervals.
Do to the number of heart rate monitors available on the market, we can’t feasibly test them all.
Research standardized calculations such as RMSSD can still appear slightly different between systems. This could be due to differences in hardware (heart rate monitors, etc.). But it is usually due to differences in the way misreads and signal noise are handled.
Why discharge your heart rate monitor? Sometimes the heart rate monitor can retain some residual charge that causes interference in the signal. These steps will remove any residual charge and allow for a cleaner signal. Depending on the monitor, this may have to be done every once in a while.
If your Polar H7 or Polar H6 is malfunctioning, please visit the Polar support site for additional assistance:
For Bluetooth connection issues, we have come up with a list of troubleshooting tips that seem to help in most cases.