I have a 10 yr old Edge 500, which yes, is a bit long in the tooth. It works fine, except the heart rate it reports is probably 50%/70% higher than true when compared to my Apple Watch. I'm a 64 yr old male, and on yesterday's 17 mi ride it showed avg heart rate of 181, peak 229, which is obviously wrong or I would have been hospitalized. Also shows only 87 calories burned during the ride. Apple Watch reports avg HR of 122, peak 169, with 758 calories burned.
Any fixes for my Garmin, or should I just get a new one??