I previously owned 4 chest strap HRM( including a garmin hrm) and all of them ending up with the same issue: the reading would go up like crazy—- even when im standing still the heartbeat reading would be like in 170s.
Yesterday i was planing a long ride and i was packing my cameras. Suddenly i realized that my insta go2 has a magnet pendant, which the camera is attached to in front of my chest. I wonder if this magnet would interfere with the HRM and eventually destroy it?