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Forerunner 255s - heart rate stops being monitored in strength training

Few minutes after starting strength training heart rate stops being monitored. Screen shows '--' instead of measured heart rate. It happened to me twice on two consecutive trainings. Stopping and saving training does not help, turning the watch off and on does. Same thing happened to my friend yesterday.

Firmware version: 17.26

0 ovekvam over 1 year ago

Are you using wrist based watch sensors, or a dedicated chest band? My experience is that wrist based heart rate monitor is fairly useless for strength training (with any type of watch), as we use the wrists a lot when lifting weights, disturbing the sensors.

0 Radek-k over 1 year ago in reply to ovekvam

Yes, i am using wrist based sensor. I am able to accept lowered sensor accuracy, as it's better than nothing. I just want it to keep working. Next time at the gym i won't start training and check if the sensor keeps measuring.

0 global_local over 1 year ago in reply to ovekvam

It is another topic to discuss how precise is the OHR sensor is on anaerobic load. Here is mentioned the wrong behavior of OHRS. It was to me the same, HR will not be displayed at all. The body battery value was away at the same time. It is definitely a bug.