Heart rate and time should be continuously displayed, constantly monitored. I have an Omron heart-rate monitor (chest strap) and the Omron wrist read-out and my old Polar wrist strap and another older one I have all read it consistently and accurately. The Schwinn reads it’s signal much of the time but sometimes shows zero pulse (no signal) or …
https://www.amazon.com/Schwinn-270-Recumbent-Bike/dp/B00OYMHLXE